Help please, I am running a real old system (just for internet, Win 98se) and had problems with Mcafee antivirus updating itself. Tried the helpline who went through deleting lots of temp files etc. Reloaded Mcafee, it now works, but the computor is extreamly slow (even when not connected to the net) It also will not perform scancheck etc. It will start to run this, but then just loops itself (a few bars on the progress come up, then reset and so on) and after 10 attempts states that Windows is still writing to the c-drive, please shut down as many running programs as possible). Same applys-ish to defrag. I have obviously deleted something important but any ideas what and how to get it back again?