Help, need advice on a VIRUS and windows 8 reinstallation

legendp2011

Honorable
May 27, 2012
16
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10,510
Computer is alienware 14 late 2013, windows 8

Hi. I am currently rebuilding a freinds computer (he had a virus called winzip registry optimizer), I ran a full scan in safe mode with both Malwarebytes free and avsast free to eradicate it but also found 11 other viruses. I deleted and cleared all the viruses, but was unsure if there might still be some lingering. so I did a full system reinstall to be on the safe side, I have a dell usb stick for that but I chose to just use the inbuilt "remove everything and reinstall windows option". see linked in picture. my question is, is it possible the virus was on the reinstall drive, I want to be 100% sure I got this thing. thanks.

http://www.flickr.com/photos/102212007@N03/11888595996/