I have been having this issue for the past few days now. Any error message that pops up in Solidworks it freezes on the screen. I can continue working and it doesnt seem to effect anything there is just a stuck error message on my screen which can be quite annoying to work around. I have attached an example image below of what I see. This has happened to me while modeling and drawing so it doesn't seem to matter what I am doing in the software.
If anyone has any ideas or input I would appreciate it.