Backdoor.Tid!inf Help.............

Hello

 

I recently ran a full scan using Norton 360. It appears that there is a high-risk virus called Backdoor.Tid!inf (funny name) in my BACKUP folder that I created when I reinstalled Vista about 1 week ago. The files in the folder isn't very important, and the infected file is called kbdclass.sys in my Windows/System32/drivers folder. I was wondering if I can just delete the whole Folder

 

I have 2 photos of the virus, where it's at, and info about the virus. One is below, and one is in the attachments. No virus. Please help, thanks.6931iB94EC452C688B3BA