When you choose details, it should give you information concerning the cause and particularly which dll was involved. If it does, copy the dll to safe place and delete the original. This solved the problem for me and if the (now) missing dll causes other problems you can put it back where you copied it from. Robert -----Original Message----- From: PCSOFT - Personal Computer software discussion list [mailto:[log in to unmask]] On Behalf Of John Green Sent: Wednesday, 1 December 2010 11:37 AM To: [log in to unmask] Subject: Re: [PCSOFT] Solution to "(app) has encountered a problem and must close..." Jim, you did not mention what OS you are using, I am not positive, But I believe Office 2000 was designed to run with Win 2000, that could be an issue, If you are using Office 2000 with Win XP there may be compatibility issues Office 2002 AKA Office XP would be a better solution. It is not supported by Microsoft any longer, But, you may find used software for sale cheap on Craigs List and other such places. -----Original Message----- Subject: Solution to "(app) has encountered a problem and must close..." Since installing my new computer a year ago I had a problem: After running most applications, Msft and non-Msft - Excel, Word, I. E., a genealogical app, etc., for 5 minutes to 30 minutes a window appeared: "(app) has encountered a problem and must close..." I could chose "details", "Report to Msft" but regardless of what I did the app closed. I could reboot the app but the window would reappear, sooner or later. After much research and tech help the answer: My "Office 2000 Small Business" app was received with my prior Dell PC, and it worked OK with my new non-Dell PC - until the "Encountered" window appeared. However it is apparently designed (?) not to work on a non-Dell, causing the problem - not just on Office but in other apps as well. Since un-installing the Office 2000 app, my other apps have have worked OK - no more nasty windows. And I have been running a trial version of Office 2010 with no problems. My old Office 2000 disks are marked: "For distribution with a new PC only..." I guess this implies it ONLY works with the particular "new PC". Does anyone know a work-around for this problem? I'd prefer to continue using the old Office 2000 - buying the 2010 iteration would do nothing for me other than diminish my finances. Jim Harris , Philadelphia PCSOFT's List Owners: Bob Wright<[log in to unmask]> Mark Rode<[log in to unmask]> PCSOFT's List Owners: Bob Wright<[log in to unmask]> Mark Rode<[log in to unmask]>