To run System Restore on Windows 8.1, visit the Control Panel of your system, select the System Restore option, and follow the instructions. Wait for the system to prompt you to select a restore point that is already available or create one manually depending on your needs.
First, enter Control Panel in the search box on the Start screen, and click or tap on Control Panel. In the Control Panel search box, type in "recovery," and then click Recovery. Tap or click on Open System Restore. This opens the System Restore dialog box with a brief description of its function. Click the Next button on this dialog box. Click on Scan for Affected Programs to see which drivers and programs are to be deleted after running the System Restore option.
You can also select the checkbox titled Show More Restore Points to see the full list of restore points. Select the restore point from this list, and click on Next. This opens the Confirm Your Restore Point dialog box that displays the exact date and time at which your system reverts. Click on the Finish button, and click Yes to confirm. Wait for your computer to restart to complete the restoration.