Hamlet77
It sounds like you caught a virus, I would suggest that you go to an online virus checker, like
Symantec (there are others), and have your PC virus checked.
I have had something similar happen to me, something was downloaded to my PC (nothing to do with LW) that disabled my Norton AV and PF 2003 apps. It took me about 8 hours to correct this nonsense.
Hopefully, you could have your problem sorted in an hour or so.
Hope this helps
UK Bob