After I run Free up space > System junk in Avast Cleanup Premium (version 21.1 build 9940), iTunes was broken. I could open it, but:
- I was prompted to log in to my account, twice, even though I'd already been logged in.
- I couldn't change the view (e.g. from Music to Podcasts).
- I couldn't even quit iTunes. I had to open the Task Manager and use "end task" to close it.
When I cleaned up system junk, I had the following selected: Program backup files, Program cache files, Program temp files, Windows temp files, Windows cache files, Windows log files.
This issue has happened three times:
First time: I didn't know what caused it, but was able to repair iTunes and get it running again.
Second time: I realized it happened after I'd run Cleanup.
Third time: To make sure it was, in fact, Cleanup causing the issue. iTunes worked immediately before, was broken right after I ran "Free up space".
I'm using a Microsoft Surface laptop with Windows 10 20H2 build 19042.928. The iTunes version is 12.10.11.2, 64-bit.
I tried going to Settings > Apps and running repair for iTunes, but that didn't work. I had to completely uninstall and reinstall it.
Is this a known issue, and if so, when will the bug be fixed? If it isn't, please open a bug report and get it fixed.