Will follow self fix details and post details as below as far as i can; Pc has purple destop backround and pop ups keep appearing prompting me to buy personal shield pro. Pop up from icons bar says, Aplication cannot be executed. The file TCrdMain.exe is infected. Please activate your antivirus software. Cannot print anything either. Downloads of OTL and HJT will not run, will post this now as i am going into safe mode to try and run them!