I am getting this error on a Windows 7 Professional 32-bit machine, on almost anything I do: updating a repo from subversion, accessing a local IIS site, copying a big folder, running an installer. Sometimes, if I try again, it get solved.
I think there is something wrong with Windows 7. I searched around and found posts suggesting to increase IRPStackSize value in registry I did that without luck. I am using Microsoft Security Essentials 1.0.1961.0 as my antivirus package.
Once this errors starts popping up, I have to restart and then after some random time it starts happening again.