Wasn't sure how to classify what's happening but I recently installed Win 7 Pro 64 bit. It ran alright for a few days but over the last 2 days, I've been getting a flickering type problem when something is opened like the task manager, my computer or outlook. The outter edges will flicker at a constant rate. Now whatever is causing this is also affecting my ability to click on tabbed items or items I try to click if I right click an item. Ex: If I have task manager open and want to close it; I right click it in the task bar to click close but the minute I move to click close the menu disappears. This happens every time. It is also true if I try to click a sub-category in the All Programs, like trying to click outlook under Microsoft Office. The minute I move from Microsoft Office to Outlook, the menu disappears. I have all current Win 7 updates and device drivers. Have very few programs install at this time and the ones I have are Win 7 compatible.