Whenever your computer shows black screen it simply means that windows GDI detection tool was installed during the update. To prevent this, reconfigure your windows automatic update to download and ask you it install. To configure your automatic update click start-->click control panel. When it opens click on security centre,
a new window will open click on automatic update, the dialog box will open. Select download updates but let me choose to install them. Click apply and ok. 
That’s it. Whenever you are on the net your computer will download updates and give you notification on your task bar that updates have been downloaded, click here to install. Now when you click the notification, a dialog box will open for you with two options, they are express install and manual install. Click on manual install, you will see the updates that windows have download and are about to be installed checked by default. Whenever you see "windows GDI detection tool" uncheck it and install others. Don’t ever install GDI detection tool that’s what black list your key and gives your black screen. If you follow through these simple steps your computer will not be detected again. If you can format your computer or repair it do so and use the serial MM9M9-Q9C6B-2988C-4B9GX-BWPWM at the back of your CD. Note this article is for educational purpose only. Do not use the example key.If you have any question click on comments below this article and ask your questions on the comments field. For more information on windows tricks please visit http://online-computer-repairs.blogspot.com. Or subscribe to our feed for more comprehensive articles that will help you keep your computer safe and secured.
