Computer question: is this spyware?

I’m running 64-bit Vista Home Premium on a laptop, and I just noticed that a bunch of strange files appeared on my second (storage) hard drive. The files are as follows:

Now my virus/spyware scanner (Avast!) hasn’t picked up anything, and a quick web search indicates that these are from a bug in Visual Studio 2008, but I don’t have VS2008 installed, nor have I ever tried. So is there any chance that these are indicative of a virus, spyware, malware, or some other kind of nastiness?

It’s not a problem, just delete. They came from the C++ runtime update on Windows Update.