Screen flashing in Windows 7

a windows 7 user. I am having an issue of Screen flashing in my computer.Whenever i select a folder an error occurs on the top left corner saying “Not Responding”. I think that is because one of my friend has modifies the registry to optimizes the shutdown speed of my computer. But what i can do now to solve to problem? Please helpYour guess is correct, this is the cause of optimiation of shutdown speed.The change can be used by Windows optimization utility or technical user who modifies the registry manually. When the setting is changed, Windows 7 may encounter lack of buffer time or other slowness.Anyways, to fix tihs error or issue, you need to fix the modifies registry. So in this case, i have attched a zip file with this post, just download it and merge it with the registry. Once it is done, reboot your computer and problem is solvedeveryone once in awhile my screen will flash black for 2 seconds then come right back on...is this the same flashing problem you guys are having? i want to make sure before i change my registry. thank u

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