Windows 10 bereikte EO (einde ondersteuning) op 14 oktober 2025. Als je Windows 10 gebruikt, lees dan dit artikel.

Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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I tried to update to 66 but i got this: Microsoft(C) Register Server has stopped working. Why?

Firefox Installatie en updates
cor-el beantwoord
Caiven
Caiven

I tried to update from 56 to 66 but got this message: "Microsoft(C) Register Server has stopped working." I didn't have this problem upgrading from 54 to 56 two days prior, why suddenly now? I'm on Windows7 64, and i was able to go and download and install "Vivaldi" browser, so it's really Firefox that is doing this, is it because i have to go to 57 first THEN to 66?? I have no idea. Anyone get this same thing?

I tried to update from 56 to 66 but got this message: "Microsoft(C) Register Server has stopped working." I didn't have this problem upgrading from 54 to 56 two days prior, why suddenly now? I'm on Windows7 64, and i was able to go and download and install "Vivaldi" browser, so it's really Firefox that is doing this, is it because i have to go to 57 first THEN to 66?? I have no idea. Anyone get this same thing?

Alle antwoorden (2)

user633449
user633449

Can you download Firefox 66 from https://www.mozilla.org/firefox/all/

cor-el
cor-el
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There are some 'watershed' builds that have special migration code to prevent profile issues with incompatible file. This can require multiple updates to get to the current release, but is usually safer.

  • Bug 1415172 - Set up watersheds to move users to Firefox 57

Such watershed build can also be used to prevent future accidents like recently happened.

  • Bug 1549018 - create a transition plan to prepare for the add-on signing root expiring in 2025

(please do not comment in bug reports
https://bugzilla.mozilla.org/page.cgi?id=etiquette.html)

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