https://bugs.winehq.org/show_bug.cgi?id=45713
--- Comment #19 from Stellarspace macariopatrick@icloud.com --- On Windows, Unity Web Player is installed in the following directory: C:\Users%username%\AppData\LocalLow\Unity\WebPlayer\
The uninstaller is installed in the following directory: C:\Users%username%\AppData\Local\Unity\WebPlayer\
If Unity Web Player is trying to update, then why not delete the following file: C:\Users%username%\AppData\LocalLow\Unity\WebPlayer\UnityWebPlayerUpdate.exe
It would no longer try to update, which means it would load normally without moving any files.