I recently installed Windows 7 RC and I was checking out MPCs Tweaks and Tips 20 Windows 7 Tweaks & Tips ÃƒÂ¢Ã¢â€šÂ¬Ã¢â‚¬Å“ Every Secret Uncovered to Date | Maximum PC when I encountered this problem. One of the tips required me to right-click on explorer.exe in my Start Menu...... and Windows 7 wouldn't let me. To elaborate, the context menu appears briefly but before I can say "boo" it disappears again. Further attempts revealed to me this happens on nearly every icon in the start menu. Not only that, it will occasionally crash explorer.exe and immediately restart it. I checked my start menu options, disabled and reenabled the "allow context menus, dragging, and dropping" option. I logged onto my guest account in case it was specific to my profile. I have booted into safe mode, thinking hardware issue...same thing. I downloaded a nifty program called ShellExView which allows me to see Shell Extensions and disable any or all context menu items...no help and I disabled every one. I went to the advanced features of my system properties and disabled every Windows appearance and aero bell and whistle (though I'm sure booting in safe mode earlier had already accomplished this). I have googled the heck out of this and found no one experiencing the same issue...I don't even know what key words to look for any more. This is a clean installation on a Dell Inspiron E1705, with an Intel Core2 2.0GHZ dual core processor (virtualization supported), 2GB RAM, and an ATI Mobility Radeon X1400 with latest drivers installed via Windows Update. This is the only issue I have encountered with Windows 7 in the 2 days I've had it installed. I can disable the option to have context menus in my start menu...but I mean, c'mon. Who the heck would do that? Someone please tell me that I've missed a check box somewhere?