Windows
Logon pop-up: "unknown software exception"
A Windows logon pop-up showed "unknown software exception" every time the session started. The machine was rebooted and the program associated with the error was removed.
Killed once by someone from XL.net, on 2026-03-11.
What you see
- Pop-up at logon with the exact text "unknown software exception"
Why it happens
Likely A program associated with the exception was likely triggering the pop-up at logon.
When it shows up
A Windows computer shows an "unknown software exception" pop-up every time a user logs in.
You are in this case if:
- Exact dialog text: "unknown software exception"
1 fix below
The steps that killed it
The steps are behind a quick check
There are two ways in and both take a few seconds. Signing in opens the steps on every bug page; so does reading the picture.
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Drawing a picture for you.
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Someone from XL.net killed this on a Windows computer on 2026-03-11. It is written up from that one repair, so it cites no outside page.