As mentioned above, Microsoft Security Essential won't do a full scan. It stops in file C:WINDOWS/system32/com/mtsadmin.tlb and I can't even cancel the scan. After I noticed that, I also noticed that windows kept wanting to update some things over and over. I don't know if that has to do anything with my problem. Someone told me to reinstall frameworks, and I think I did ( I reall know almost nothing about computers): ).