ACER OEM W7x64 Non Genuine after HDD/Malware Issues

Hi, I don't know where to start explaining the stuff I have done in the last 2 weeks in regards to this PC. I had HDD/Partition issues, I couldn't start in Safe Mode, without BSOD initially. I was able to "rectify" enough using Install DVD iso from digitalriver. I ran a restore to a point just prior to OS failing, but I think it was a point full of malware, and has brough with it more...