Questscan dll is not a valid windows image

[Guest]

any help on the above error message, which seems to be preventing me from being able to open much on this computer, would be greatly appreciated.

 

[AntiZig]

it's most likely malware

 

[hubbardt]

This is defintely malware and you want to remove it form your PC
http://virus-com.com/viruscom/viruscom_124108.html

You can follow the manual remove instructions in the link above or try a free malware removal program like the link below
http://www.malwarebytes.org/products/malwarebytes_free

 

[eyemoeba]

nice one