Hello, This problem just started occurring with a project I have been building successfully for days. When building with VisStudio 2008 from the command line, I am getting a crash error titled "Microsoft C/C++ Compiler Driver". This happens very consistently on the 18th .c or .cpp module being compiled. I have 10 gb. free on disk, I have cleaned out my %TEMP% dir, and I have re-started my computer. Any changes to my computer over the last few days would have come via automatic updates (company policy -- I would prefer to update manually). I have repaired/reinstalled VisStudio 2008. That did not help, so I uninstalled and reinstalled VS 2008. Problem sitll occurs. According to the error report, the problem is occuring in msvcr90.dll, version 9.0.30411.0. Thanks for any advice on how to fix this.