# Crash on startup after update to 26.09.2

**URL:** <https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064>\
**Category:** Help\
**Created:** [September 15, 2026, 10:13pm UTC](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064 "2026-09-15T22:13:22Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![abdo](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/abdo/32/654_2.png) [@abdo](https://forums.ankiweb.net/u/abdo)\
**Post date:** [September 15, 2026, 10:42pm UTC](https://forums.ankiweb.net/t/crash-on-startup-after-update-to-26-09-2/71064/3 "2026-09-15T22:42:50Z")

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I assume you’re `@BtbN` on GitHub: [All-users installation of MSI package fails to detect existing installation · Issue #5037 · ankitects/anki · GitHub](https://github.com/ankitects/anki/issues/5037#issuecomment-5688375922)

Can you run the .msi from the terminal with logging enabled using a command like this and send the log file?

```bat
msiexec /i "anki-26.09.2-win-x64.msi" /L*V "install.log"

```

> [@Oromit](#):
>
> Ironically, updating from 26.09 to 26.09.2 has caused what the update claimed to fix: A crash on startup

I had a similar startup crash while testing the update from 26.09 to 26.09.1 (which is why 26.09.1 was skipped). The issue turned out to be that Windows installer is skipping copying/updating some files because they have older versions. 26.09.2 is supposed to force-copy all files regardless of their versions, ~~but [only for non-administrative installations](https://learn.microsoft.com/en-us/windows/win32/msi/reinstallmode) according to Windows Installer’s behavior. I’ll see if there’s a way to enforce that consistently.~~ (EDIT: this is wrong - administrative Installation is about network installation).

> [@Oromit](#):
>
> But one of my AddOns, which worked fine on 26.9.0 before now fails to load on 26.9.2, which seems odd.

Can you post the error? It’s probably related to [fix: Lock bundled dependencies by abdnh · Pull Request #5593 · ankitects/anki · GitHub](https://github.com/ankitects/anki/pull/5593)

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