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prefs can't be opened due to invalid character error code 800A03F6

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New Contributor

prefs can't be opened due to invalid character error code 800A03F6

Can't change prefs because the file can't be opened due to invalid character error code 800A03F6 User file can't be opened due to invalid character error code 800A138F

4 REPLIES
Site Moderator

Re: prefs can't be opened due to invalid character error code 800A03F6

May I ask where you are getting the error message from? Also a screen shot will help if you can do that.

New Contributor

Re: prefs can't be opened due to invalid character error code 800A03F6

It is when I go to windows explorer, users, appdata, mozilla, firefox, default..... Both the Prefs and user folder won't open, so I can't see what the settings are and therefore I can't change the preferences because the error message prevents the folder from opening.

Site Moderator

Re: prefs can't be opened due to invalid character error code 800A03F6

I see that you are on a Windows 8 preview, so make sure that you only run programs that are full compatible with Windows 8.

You can do a disk check with the chkdsk.exe program.
If you run the chkdsk.exe program from a cmd.exe Command window then you can read the response from the chkdsk.exe program.

Open a cmd.exe window:
Start > Run: cmd.exe <press Enter>

At the command prompt (>) type or Copy&Paste: chkdsk.exe /f /r <press Enter> (put a space before /f and /r)

If you get something like: Would you like to schedule this volume to be checked the next time the system restarts? y/n then answer the question with "Y" and close all programs and reboot the computer.


You may have to remove the entire Mozilla or Firefox folder in AppData.

New Contributor

Re: prefs can't be opened due to invalid character error code 800A03F6

thanks cor-el, I 'll give it a try it's not a big problem, just a nuisance that I can't fix something and change the preferences. It didn't correct the problem. Thanks anyway.