I just updated Adobe Flash and when that was done, I found that File1 Package Manager had also installed and had launched and was in turn attempting to update my Ant.com video downloader. Pressing "cancel" did nothing, and when I went into the Task Manager (using ctl-alt-del) and clicked on "end process" I got an error message that I did not have authorization to end the process.
Eventually it ended on its own, but WTF? It looks like malware: downloading, installing, and running all without my knowledge or consent. When I Google it, there's almost no information out there about it.
I'll do a full system scan with Microsoft Security Essentials, but I'd also really like to know if anybody out there has heard of this.