screen lock up w/o error prompts - and its not the video card issue

I have been trying to source a problem using SW 09(SP3) onVista (32) - the problem is the graphics area in part/assembly modewhich happens within a couple of minutes of startup of SW. I canmove the cursor, access the feature tree, save the file, move toother parts(but in other parts the same problems exists). No SWerror prompts - just locks up SW model space

I switched out graphics card(Quadra FX3500) from a like system- nosolution
I switched out the HD - no solution
System checks for bad memory - all pass
Had Dell update BIOS - no solution
Turned off drivers to Space Ball - no solution

No problems when opening the parts on other Vista 32bit systems andworks really well on XP OS.
Things I havent done:
- I do not have SP2 for Vista loaded(released last month) -good chance it wont apply since this problem occured earlier in theweek
- with new reinstall I dont have SP3 up - good chance itwont apply since this problem occured earlier in the week

I have read Outlook compatibilty - my system installed a couple ofOffice Outlook updates(KB969907 and KB963677) earlier in the week6/13 ???

Since I was able to work the part/assembly files on other ocmputersI have ruled out a bad feature,etc.

Any ideas?

thanks

Chris


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