Could not open installed Quicken Deluxe 2011 in Windows XP

We tried the clean boot and create a new user account, which didn't solved our problem with the inability to open our software Quicken Deluxe 2011.   Somewhere, we believe we have a conflict with Microsoft or XP, but we do not know where to look longer.  It is ongoing since February 11, 2012.   FYI, we know it's probably not the Quicken software, we have loaded on my laptop that is running Windows 7 and it loaded and opens very well.  Cannot run on the laptop as it is for the companies only, so still need solution for the desktop computer running Windows XP.  Appreciate all the good ideas out there. Thank you.

Quicken Deluxe 2011 works fine (for many / most) with Windows XP.  So:

1. what version of XP you have, including the Service Pack?
2. is this a new installation of Quicken 2011 or he just stop working on February 11, 2012?  If the latter, what happened on Feb. 11 (or Feb 10)?
3. what happens when you try to start Quicken?  What is the full error message without paraphrase?
4. what application antivirus do you use and when their subscription expire?
5. open Control Panel > add or remove programs.  List of ALL entries that start "Microsoft .NET Framework... »
6. have you followed the instructions in the following two articles, and if so, what happened:

Cannot open Quicken for Windows after Installation
         Cannot open Quicken on a computer running .NET Framework 4

Tags: Windows

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