|Very unclear post. |
Your profile specs say XP, you reference that you cannot run Vista; is the Acer running Vista or XP? You also don't say what the 3rd party application is (Software name and Rev #'s always help) that you're trying to run either. Sounds like that app may not be compatible with Vista. If the app doesn't run on Vista, run it on XP.
Vista is crap! Avoid at all costs. (<-Period).
Just another stupid saying...