Just a footnote to the above. I uninstalled LabView, NI-VISA and VIPM, rolled back the computer and started again this time forgetting about all the updates to LabView and just leaving it in evaluation mode. It took me hours but didn't change the problem. I then put Labview, NI-VISA and VIPM on my Windows 7 machine and it worked without issues. Both machines are running AVG antivirus. Does this give any clues to the problem. Wiki-Errors suggests I download a registry fixer but am a little worried about doing this - 0xC000005 errors are apparently not just created by VIPM.