Hi and welcome.
To recover your desktop you'll need to run the System Restore utility on your PC. I will provide instructions to do that here.
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To restore system files and settings using a recommended restore point
Open System Restore by clicking the Start button . In the search box, type System Restore, and then, in the list of results, click System Restore. If you're prompted for an administrator password ***** confirmation, type the password ***** provide confirmation.
Click Recommended restore, and then click Next.
If there isn't a recommended restore point, follow the steps below to choose a specific restore point.
If you have any questions, please feel free to let me know.