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#11
I would unplug all other HD's, set BIOS to defaults setting SATA controller to AHCI, wipe the HD from the booted Win7 installer's Command Line with Diskpart Clean Command
and then do the Clean Install Windows 7. This will wipe out any infection and give you the cleanest slate to get a perfect install.
Read over the steps I gave you earlier to see what works best preparing and setting up your new install. I would use only the tools and methods given in Clean Reinstall - Factory OEM Windows 7 to know for sure you will get and keep a perfect install.