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Hi Which operating system you are using ?
Sometime it accidentally becomes your screen's background or wallpaper. Try setting new wallpaper and see if it helps
Once you confirm that the image has not became your wallpaper then simply follow this instruction. I have made a customized document for you with screen shot to fix this issue.
ok . Please follow the screenshots you should be able to get rid of it
No, I mean open the document which I have prepared for you and just do automatic system repair. It should fix you problem. I have given images in my document to make it easier.
Sending it again. Please click on below link
In advanced option click on Automatic repair and then restart your machine.
Also set some other wallpaper in you machine to see if frozen picture is going away or not. Are you able to use other application normally the way you used to do it earlier ?
Can you send the screenshot of your frozen screen ?
Please click here and let this tool repir your problem. This is microsoft's toll to fix your problem Windows Update Troubleshooter.
Did this worked ?