I suspected a spyware/adware. However, both ad-aware and spybot shows nothing. Suspicious, I went to look at the startups using EasyCleaner. I found the following suspicious entry that does now seem to be there before: C:\WINDOWS\temp\lsass.exe
What I did: I used msconfig to uncheck this so that it does not run at startup.
Problem is gone.
My question, is this entry safe to be deleted? And the file safe to be deleted? Thanks