I found this file called "WebCleaner.dll" on the root of my C drive. It appears to have something to do with the Microsoft Malicious Software Removal Tool. But I have two computers and it does not exist on my other computer running the same OS. It also does not exist on computers owned by various friends. I have never installed any kind of cleaner program.

Anyone have any idea what this file is all about and whether it is safe to remove it?

Thanks.

Dell Dimension XPS Gen 4
Win XP Home SP2
P4 3.4Ghz