Please post your Troubleshooting Information. At the top right of the Thunderbird window, click the menu button , then select Help > Troubleshooting Information. Press the "Copy text to clipboard button" and paste the information into your reply.

The total Troubleshooting Information is too long for one message. Here is the first part:

 Application Basics

   Name: Thunderbird
   Version: 52.3.0
   User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0
   Profile Folder: Open Folder

             (Local drive)
   Application Build ID: 20170815040357
   Enabled Plugins: about:plugins
   Build Configuration: about:buildconfig
   Memory Use: about:memory
   Profiles: about:profiles

 Mail and News Accounts
   account2:
     INCOMING: account2, , (none) Local Folders, plain, passwordCleartext

   account6:
     INCOMING: account6, , (imap) imap.virginmedia.com:993, SSL, passwordCleartext
     OUTGOING: , smtp.virginmedia.com:465, SSL, passwordCleartext, true

   account7:
     INCOMING: account7, , (imap) mail.xccomms.com:143, alwaysSTARTTLS, passwordCleartext
     OUTGOING: , smtp.xccomms.com:587, plain, passwordCleartext, true

   account14:
     INCOMING: account14, , (imap) mail.wokinghamlions.org.uk:143, alwaysSTARTTLS, passwordCleartext
     OUTGOING: , smtp.wokinghamlions.org.uk:587, plain, passwordCleartext, true

   account15:
     INCOMING: account15, , (imap) imap.gmail.com:993, SSL, OAuth2
     OUTGOING: , smtp.gmail.com:465, SSL, OAuth2, true

 Crash Reports

 Extensions
   AddressBookTab, 1.5, true, AddressBookTab@dischert.luc
   AddressLabel, 9, true, AddressLabel@Markus
   CategoryManager, 2.04, true, sendtocategory@jobisoft.de
   gContactSync, 2.0.12, true, gContactSync@pirules.net
   Lightning, 5.4.3, true, {e2fda1a4-762b-4020-b5ad-a41df1933103}
   Manually sort folders, 1.1.1, true, tbsortfolders@xulforum.org
   PrintingTools, 1.2.5, true, {5e9999c2-ba1d-44b6-bcee-5b30ce37d3b0}
   Provider for Google Calendar, 3.3, true, {a62ef8ec-5fdc-40c2-873c-223b8a6925cc}
   MoreFunctionsForAddressBook, 1.0b3, false, {3e17310d-82e8-4a43-bd2f-7c3055bfe589}

..and here is the second part:

 Important Modified Preferences

   Name: Value

     accessibility.typeaheadfind.flashBar: 0
     browser.cache.disk.capacity: 358400
     browser.cache.disk.filesystem_reported: 1
     browser.cache.disk.smart_size_cached_value: 358400
     browser.cache.disk.smart_size.first_run: false
     browser.cache.disk.smart_size.use_old_max: false
     dom.apps.lastUpdate.buildID: 20160901155122
     dom.apps.lastUpdate.mstone: 49.0
     dom.apps.reset-permissions: true
     extensions.lastAppVersion: 52.3.0
     font.internaluseonly.changed: true
     font.name.monospace.el: Consolas
     font.name.monospace.x-cyrillic: Consolas
     font.name.monospace.x-unicode: Consolas
     font.name.monospace.x-western: Consolas
     font.name.sans-serif.el: Calibri
     font.name.sans-serif.x-cyrillic: Calibri
     font.name.sans-serif.x-unicode: Calibri
     font.name.sans-serif.x-western: Calibri
     font.name.serif.el: Cambria
     font.name.serif.x-cyrillic: Cambria
     font.name.serif.x-unicode: Cambria
     font.name.serif.x-western: Cambria
     font.size.fixed.el: 14
     font.size.fixed.x-cyrillic: 14
     font.size.fixed.x-unicode: 14
     font.size.fixed.x-western: 14
     font.size.variable.el: 17
     font.size.variable.x-cyrillic: 17
     font.size.variable.x-unicode: 17
     font.size.variable.x-western: 17
     mail.openMessageBehavior.version: 1
     mail.winsearch.firstRunDone: true
     mailnews.database.global.datastore.id: ba3914cb-1056-4a3a-b620-be47f9075d0
     mailnews.database.global.views.conversation.columns: {"threadCol":{"visible":true,"ordinal":"1"},"flaggedCol":{"visible":true,"ordinal":"3"},"attachmentCol":{"visible":false…
     mailnews.database.global.views.global.columns: {"threadCol":{"visible":true,"ordinal":"1"},"flaggedCol":{"visible":true,"ordinal":"3"},"attachmentCol":{"visible":false…
     media.gmp.storage.version.observed: 1
     network.cookie.prefsMigrated: true
     network.predictor.cleaned-up: true
     places.database.lastMaintenance: 1506725896
     places.history.expiration.transient_current_max_pages: 122334
     plugin.importedState: true
     plugin.state.flash: 0
     print.always_print_silent: false
     print.printer_EPSON75228B_(XP-610_Series).print_bgcolor: false
     print.printer_EPSON75228B_(XP-610_Series).print_bgimages: false
     print.printer_EPSON75228B_(XP-610_Series).print_duplex: -437918235
     print.printer_EPSON75228B_(XP-610_Series).print_edge_bottom: 0
     print.printer_EPSON75228B_(XP-610_Series).print_edge_left: 0
     print.printer_EPSON75228B_(XP-610_Series).print_edge_right: 0
     print.printer_EPSON75228B_(XP-610_Series).print_edge_top: 0
     print.printer_EPSON75228B_(XP-610_Series).print_evenpages: true
     print.printer_EPSON75228B_(XP-610_Series).print_footercenter:
     print.printer_EPSON75228B_(XP-610_Series).print_footerleft: &PT
     print.printer_EPSON75228B_(XP-610_Series).print_footerright: &D
     print.printer_EPSON75228B_(XP-610_Series).print_headercenter:
     print.printer_EPSON75228B_(XP-610_Series).print_headerleft: &T
     print.printer_EPSON75228B_(XP-610_Series).print_headerright: &U
     print.printer_EPSON75228B_(XP-610_Series).print_in_color: true
     print.printer_EPSON75228B_(XP-610_Series).print_margin_bottom: 0.5
     print.printer_EPSON75228B_(XP-610_Series).print_margin_left: 0.5
     print.printer_EPSON75228B_(XP-610_Series).print_margin_right: 0.5
     print.printer_EPSON75228B_(XP-610_Series).print_margin_top: 0.5
     print.printer_EPSON75228B_(XP-610_Series).print_oddpages: true
     print.printer_EPSON75228B_(XP-610_Series).print_orientation: 0
     print.printer_EPSON75228B_(XP-610_Series).print_page_delay: 50
     print.printer_EPSON75228B_(XP-610_Series).print_paper_data: 9
     print.printer_EPSON75228B_(XP-610_Series).print_paper_height: 297.00
     print.printer_EPSON75228B_(XP-610_Series).print_paper_name:
     print.printer_EPSON75228B_(XP-610_Series).print_paper_size_unit: 1
     print.printer_EPSON75228B_(XP-610_Series).print_paper_width: 210.00
     print.printer_EPSON75228B_(XP-610_Series).print_resolution: 360
     print.printer_EPSON75228B_(XP-610_Series).print_reversed: false
     print.printer_EPSON75228B_(XP-610_Series).print_scaling: 1.00
     print.printer_EPSON75228B_(XP-610_Series).print_shrink_to_fit: true
     print.printer_EPSON75228B_(XP-610_Series).print_to_file: false
     print.printer_EPSON75228B_(XP-610_Series).print_unwriteable_margin_bottom: 0
     print.printer_EPSON75228B_(XP-610_Series).print_unwriteable_margin_left: 0
     print.printer_EPSON75228B_(XP-610_Series).print_unwriteable_margin_right: 0
     print.printer_EPSON75228B_(XP-610_Series).print_unwriteable_margin_top: 0
     print.printer_Foxit_Reader_PDF_Printer.print_bgcolor: false
     print.printer_Foxit_Reader_PDF_Printer.print_bgimages: false
     print.printer_Foxit_Reader_PDF_Printer.print_duplex: -437918235
     print.printer_Foxit_Reader_PDF_Printer.print_edge_bottom: 0
     print.printer_Foxit_Reader_PDF_Printer.print_edge_left: 0
     print.printer_Foxit_Reader_PDF_Printer.print_edge_right: 0
     print.printer_Foxit_Reader_PDF_Printer.print_edge_top: 0
     print.printer_Foxit_Reader_PDF_Printer.print_evenpages: true
     print.printer_Foxit_Reader_PDF_Printer.print_footercenter:
     print.printer_Foxit_Reader_PDF_Printer.print_footerleft: &PT
     print.printer_Foxit_Reader_PDF_Printer.print_footerright: &D
     print.printer_Foxit_Reader_PDF_Printer.print_headercenter:
     print.printer_Foxit_Reader_PDF_Printer.print_headerleft: &T
     print.printer_Foxit_Reader_PDF_Printer.print_headerright: &U
     print.printer_Foxit_Reader_PDF_Printer.print_in_color: true
     print.printer_Foxit_Reader_PDF_Printer.print_margin_bottom: 0.5
     print.printer_Foxit_Reader_PDF_Printer.print_margin_left: 0.5
     print.printer_Foxit_Reader_PDF_Printer.print_margin_right: 0.5
     print.printer_Foxit_Reader_PDF_Printer.print_margin_top: 0.5
     print.printer_Foxit_Reader_PDF_Printer.print_oddpages: true
     print.printer_Foxit_Reader_PDF_Printer.print_orientation: 0
     print.printer_Foxit_Reader_PDF_Printer.print_page_delay: 50
     print.printer_Foxit_Reader_PDF_Printer.print_paper_data: 9
     print.printer_Foxit_Reader_PDF_Printer.print_paper_height: 297.00
     print.printer_Foxit_Reader_PDF_Printer.print_paper_name:
     print.printer_Foxit_Reader_PDF_Printer.print_paper_size_unit: 1
     print.printer_Foxit_Reader_PDF_Printer.print_paper_width: 210.00
     print.printer_Foxit_Reader_PDF_Printer.print_resolution: 600
     print.printer_Foxit_Reader_PDF_Printer.print_reversed: false
     print.printer_Foxit_Reader_PDF_Printer.print_scaling: 1.00
     print.printer_Foxit_Reader_PDF_Printer.print_shrink_to_fit: true
     print.printer_Foxit_Reader_PDF_Printer.print_to_file: false
     print.printer_Foxit_Reader_PDF_Printer.print_unwriteable_margin_bottom: 0
     print.printer_Foxit_Reader_PDF_Printer.print_unwriteable_margin_left: 0
     print.printer_Foxit_Reader_PDF_Printer.print_unwriteable_margin_right: 0
     print.printer_Foxit_Reader_PDF_Printer.print_unwriteable_margin_top: 0
     print.printer_XP-610_Series(Network).print_bgcolor: false
     print.printer_XP-610_Series(Network).print_bgimages: false
     print.printer_XP-610_Series(Network).print_duplex: -437918235
     print.printer_XP-610_Series(Network).print_edge_bottom: 0
     print.printer_XP-610_Series(Network).print_edge_left: 0
     print.printer_XP-610_Series(Network).print_edge_right: 0
     print.printer_XP-610_Series(Network).print_edge_top: 0
     print.printer_XP-610_Series(Network).print_evenpages: true
     print.printer_XP-610_Series(Network).print_footercenter:
     print.printer_XP-610_Series(Network).print_footerleft: &PT
     print.printer_XP-610_Series(Network).print_footerright: &D
     print.printer_XP-610_Series(Network).print_headercenter:
     print.printer_XP-610_Series(Network).print_headerleft: &T
     print.printer_XP-610_Series(Network).print_headerright: &U
     print.printer_XP-610_

Ideally, when there is an issue like this we ask for Thunderbird to be run in Safe Mode so as to eliminate the effects of add-ons. Of course Lightning is an add-on so we can't do this in your case.

I would suggest temporarily disabling all the add-ons that are not needed for the address book - so that means all but Lightning and Provider.

I don't like tabs overmuch myself so I have not tried any add-ons that coerce things into tabs; but since these add-ons are tinkering with the way things are displayed, I'd be suspicious of AddressBookTab in particular.

AddressBookTab 1.5

Works with Thunderbird 3.0 - 28.0.

Get rid of this add-on. You can search AMO for alternatives. https://addons.mozilla.org/en-US/thunderbird/

Without the add-on, is there any difference?

If not, disable all other add-ons except Lightning and Provider for Google Calendar.

I had already tried disabling all add-ons except Lightning and Provider for Windows and it didn't make any difference. I have just tried again and proved again that it doesn't make any difference

I had already tried disabling all add-ons except Lightning and Provider

And you didn't think that was worth mentioning?

Try to create a new profile using profile manager. https://support.mozilla.org/kb/using-multiple-profiles

Start Thunderbird with the new profile via profile manager. Then install the latest version of the provider add-on, and set up your Google Calendar.

Does that work?

I will try. However, as I stated originally I am using an exact copy of a profile that works correctly on another PC

I created a new profile in the Users>AppData>Thunderbird folder. I added my Google e-mail account and can correctly see e-mails. The Lightning add-on is automatically included, and I installed the Provider for Windows add-on then re-started. Calendar doesn't show in the menu, but I can open it via the Events & Tasks menu. I was then able to add my Google calendar and see it correctly.

HOWEVER: All my PC's have a separate partition that I designate S: and use for storing all my data . I have created a folder S:\Thunderbird on each PC for storing the profile. I closed Thunderbird then copied the contents of the Users>AppData>Thunderbird folder to a new folder S:\Thunderbird2 and configured Thunderbird to use this profile.

If I open the Users>AppData>Thunderbird profile it works correctly. If I open the S:\Thunderbird2 profile (or the S:\Thunderbird profile which is copied from a working PC) I have the original problem. It seems therefore that the problem is related to the location of the profile, since in each case the profile contents are identical to profiles that work.

Please post the contents of your profiles.ini file.

That's interesting. I now have 3 profiles:

Users>AppData>Thunderbird: works but doesn't have a profile.ini file

S:\Thunderbird2: is identical to the above but doesn't work, and doesn't have a profile.ini file

S:\Thunderbird: is copied from a working PC but doesn't work. It includes a profile.ini file with the following contents:

[General] StartWithLastProfile=1

[Profile0] Name=default IsRelative=1 Path=Profiles/6ue3unm7.default Default=1

I now have 3 profiles: Users>AppData>Thunderbird: works but doesn't have a profile.ini file

C:\Users\<your_user_id>\AppData\Roaming\Thunderbird

That isn't a profile, it's the location of your profiles.ini file. That location is fix, and cannot be changed. There is only one profiles.ini file for all profiles. If you have multiple profiles.ini files, you're doing something wrong. All existing profiles are to be listed in the profiles.ini file, regardless of their location in the file system. Your actual profile folder is 6ue3unm7.default. Why your other profiles aren't listed in profiles.ini I don't know.

If you want to migrate the now working profile folder to another location, just go ahead, but make sure to adjust profiles.ini accordingly. If you don't know how to properly adjust profiles.ini, don't guess, ask. And stop copying stuff around, it doesn't seem to do you any good.

I have followed the instructions given on https://support.mozilla.org/en-US/kb/moving-thunderbird-data-to-a-new-computer . It works perfectly on one PC, so I now have Thunderbird working correctly on the original PC and the second one. However, when I followed exactly the same process on the third PC the calendar doesn't work. I have tried numerous ideas to identify the reason, including moving the profile to different locations.

In desperation I have uninstalled Thunderbird from the problem PC, then cleaned it (using Ccleaner) and fixed the registry. I have deleted all reference to Thunderbird, then re-installed it.

I then copied the contents of the following folders from a working PC to the problem one:

C:\Users\<your_user_id>\AppData\Roaming\Thunderbird C:\Users\<your_user_id>\AppData\Local\Thunderbird S:\Thunderbird

I can therefore see no difference between the installations on the two. Thunderbird works identically on both, with the exception that the calendar doesn't work on the second one.

In desperation I have uninstalled Thunderbird from the problem PC, then cleaned it (using Ccleaner) and fixed the registry. I have deleted all reference to Thunderbird, then re-installed it.

I see three paths there. Don't waste your time with …\AppData\Local - it's used just for caching. All the action is in …\AppData\Roaming.

How are you adjusting profiles.ini to cope with all this? The only copy of profiles.ini that matters is the one in …\AppData\Roaming, and it needs to be modified to point to or reference the actual data store on S:\.

How and in what way is S:\Thunderbird superior to …\AppData\Roaming? What does this achieve for you?

In desperation I have uninstalled Thunderbird from the problem PC,

Beats me. You already had a working profile. Anyway, good luck.

Thanks for the advice ref …\AppData\Local

This is the content of …\AppData\Local\Thunderbird\profile.ini:

[General] StartWithLastProfile=0

[Profile0] Name=Thunderbird IsRelative=0 Path=S:\Thunderbird Default=1

[Profile1] Name=Default User IsRelative=0 Path=C:\Users\Alan\AppData\Local\Thunderbird

I have a policy of using the C: drive purely for applications, and keeping all data on S:. I then do an incremental back up of S: every night, maintaining a 30 day rolling history so I can retrieve anything that might be inadvertently modified, corrupted or deleted. That is why I keep my Thunderbird profile on S: