Running all the latest software? They insist that if you upgrade the desktop to 4.1.4 or whatever the latest is then it takes care of all the 2000 problems.

If you are running any third party software, remove it and see if it still happens, if it does add them back one by one to find the problem.

It may be worth a call to them, it's not a really uncommon problem, they may have a checklist to run through and pinpoint the issues.