Hi Peter,
Thanks for your quick response.
Yes the user and system have full rights on the prefs folders.
I can't say I have tried reinstalling MSVCR100.dll from Microsoft, I will try that.
Also have not tried your last suggestion, although I have installed it as Admin to the D drive, then tried running it from there as a non-admin account which produced the same crash error unfortunately.
I'm going to try the MSVCR100.dll fix and see how it goes, I'll keep you posted.