Ok all you tech gurus out there...here's a tough one. Occasionally (intermittant) I can't get a dropdown box or selection box to stay open. When I click the dropdown arrow in Windows Explorer to try and select a folder or share, as soon as I move the mouse, the dropdown box disappears. This also occurs in the task bar if I right click on an application button and try to select something from the menu. Finally, it also occurs on the Start Button if I try to select anything in the menu (such as Control Panel). I am running Windows 7 Professional on a Dell laptop with 8GB of memory, but have also experienced this on a different Dell laptop running XP Prof SP-3. I have search over a dozen blogs and forums on the internet and have compiled an extensive list of potential "fixes", none of which work: (faulty mouse, corrupt separate user account, virus/malware, TweakUI - "activation follows mouse" is set, focus policy should be set to default, etc., etc., etc.). Do a google search on the title of this post and you will see what I mean. Any ideas? Thanks!!!