I'm using a self-built Windows 7 Ultimate PC. I have a file here:
which Malwarebytes identifies as an infection (although Avira thinks it's fine).
Malwarebytes has removed it a few times and I've deleted it manually a few times, but it always reappears after a restart. It also always adds a shortcut to my Startup folder after a restart.
Here's what Malwarebytes says about it: