I suspect I may have a virus but need some help please. The screen now flickers twice each time on startup and I now have problems with the computer freezing up unexpectedly. I have McAfee running, also have run adaware and spybot, malwarebytes, secunia. Running these apps has also caused freezeups though and I have had to run them in safe mode although none of them have found anything when I do so. Also checked for Conficker in safe mode and was negative. Help please, any suggestions/thoughts? Thanks for any help!