I thought i had everything working when I encountered this little beauty for one of the ASP.NET projects:
After I bounced, the build agent, build service and the server itself, all to no avail, I hit the interwebs where I found the solution.
This error has got nothing to do with disk space, it's related to tempory files not being deleted in this folder:
C:\Windows\Microsoft.net\Framework64\<version>\Temporary ASP.NET FilesI checked the folder and sure enough there was a subfolder with the name of one of the projects. I deleted this and the builds started to complete again.