Have you updated all your programs? It sounds like you have pick up something. There is a lot of very clever spam about and some spyware. Run MS Antispyware, its a good program. But I still found items in Spybot, not picked up my MSAS, although not fatal items.Make sure you assess each item for deletion carefully, you could be deleting something that you computer needs to function. I know it is a pain, but that is the price for having a computer.