Illegal operation attempted on a registry key that has been marked for deletion

[teognost]

Hi
I installed Visual Build on a machine with Win2008Server X64.
Since I started to build on this machine -from time to time I see the build is stopped and the log says:


Process completed with exit code 1
Error firing vbld_StepDone event: Failed to instantiate script engine 'VBScript': Invalid class string
5/10/2010 2:30:10 AM: Step 'Build current project-Mixed Platforms' failed
5/10/2010 2:30:11 AM: Building failure step 'Send Gen Mail-project compilation failed(build continues)'...
Error creating custom action 'Send Mail': Illegal operation attempted on a registry key that has been marked for deletion.
5/10/2010 2:30:11 AM: Step 'Send Gen Mail-project compilation failed(build continues)' failed
5/10/2010 2:30:11 AM: Building failure step 'Send Gen Mail-failure of failure step'...
Error creating custom action 'Send Mail': Illegal operation attempted on a registry key that has been marked for deletion.
5/10/2010 2:30:11 AM: Step 'Send Gen Mail-failure of failure step' failed
5/10/2010 2:30:11 AM: Build ended (elapsed = 00:51:01).


Any idea what is causing this ?
I did not have such issues when the machine had Win2003 server X32 operating system