I bought the student version of Maple 11 last week, loaded it onto a Windows Vista machine, and used it for a few days. I had an occasional crash to the desktop, which became frustrating. Upon discovery there was a specific Vista update, I downloaded that, uninstalled the original version, installed the new one and activated it. Now, Maple does not run. If I try to start it nothing happens. No error message, nothing. This occurs regardless of how I try to start it (e.g. "Run as administrator" or not, with UAC on or off). If I try to reinstall Maple, I get the message telling me to first uninstall the previous version, but the uninstaller has the same problem as Maple itself...it will not run.