Sophos Anti-Rootkit is easy to use, but getting to it takes a minute. It installs in the root directory in a folder called SOPHTEMP. In that folder, you click a file called SARGUI to launch the simple interface. While running a quick scan on my test PC, Sophos Anti-Rootkit popped up the names of the offending files. At the end of a few minutes' scanning, it let me delete them. Bear in mind that I'm not a security expert, and I didn't put the Sophos tool through extensive tests.
One last caveat: Like many security tools, Sophos Anti-Rootkit can return the occasional false positive. Should any security program find a potential problem, it's best to make sure it's a problem before you delete something that might be harmless--or even necessary.
Note: The download link takes you to the vendor's site, where you must register to download the software.