Removing Rootkit

I scanned all of my drives with avast and it found one result, a rookit. When I try to remove it I get an error, saying that access is denied. How can I remove the rootkit properly? I'm aware that a common solution to this problem is to just wipe the drive, but I don't want to do that. The rootkit isn't (noticably) affecting me in anyway so I don't want to go through the hassle of wiping a drive to get rid of it.

Callender said:

Looks to me like Avast scanner picked up the file name from within it's own definitions database. On that basis it's a false positive detection. Check your scan settings and make them less aggressive or set that Avast Definitions folder to the list of files/ folders to be ignored.

Sorry but I can't post specific instructions as I stopped using Avast many months ago.

That's okay, good to know it's probably a false positive. Thanks.