PUP is not virus…but a warning that you have a program that can be used for good or bad depending on what it is for and who installed it

PUP (potentially unwanted program)
http://searchsecurity.techtarget.com/definition/PUP

Pasnap.exe

Pasnap.exe with description Snapshot Reader is a process file from company PixArt Imaging Incorporation belonging to product Snapshot Reader. The file is digitally signed from Microsoft Windows Hardware Compatibility Publisher - VeriSign Time Stamping Services Signer We do not recommend removing digitally signed files from Microsoft Windows Hardware Compatibility Publisher

Is this something you know ?