If you're having problems with your PC, you can try to refresh or reset it. Refreshing your PC reinstalls Windows and keeps your personal files and settings. It also keeps the apps that came with your PC and the apps you installed from the Windows Store. Resetting your PC reinstalls Windows but deletes your files, settings, and apps—except for the apps that came with your PC.
In most cases, once you start to refresh or reset your PC, it’ll finish on its own. However, if Windows needs missing files, you’ll be asked to insert recovery media, which is typically on a DVD disc or thumb drive. If that happens, what you’ll need depends on your PC.
If your PC came with Windows 8.1 or Windows RT 8.1, you’ll need the discs or thumb drive that came with your PC. Check the info that came with your PC to see if your PC manufacturer provided these discs or media. In some cases, you might have created them when you first set up your PC.
If you upgraded your PC to Windows 8.1 or Windows RT 8.1 with a DVD, use that disc. If you don’t have Windows 8.1 or Windows RT 8.1 media, contact Microsoft Support.
If your PC isn't performing as well as it once did, and you don't know why, you can refresh your PC without deleting any of your personal files or changing your settings.
If you upgraded your PC from Windows 8 to Windows 8.1 and your PC has a Windows 8 recovery partition, refreshing your PC will restore Windows 8. You’ll need to upgrade to Windows 8.1 after the refresh has finished.
Apps you installed from websites and DVDs will be removed. Apps that came with your PC and apps you installed from the Windows Store will be reinstalled. Windows puts a list of removed apps on your desktop after refreshing your PC.
Swipe in from the right edge of the screen, tap Settings, and then tap Change PC settings.
(If you're using a mouse, point to the lower-right corner of the screen, move the mouse pointer up, click Settings, and then click Change PC settings.)
Tap or click Update and recovery, and then tap or click Recovery.
Under Refresh your PC without affecting your files, tap or click Get started.
Follow the instructions on the screen.
If you want to recycle your PC, give it away, or start over with it, you can reset it completely.
If you upgraded your PC from Windows 8 to Windows 8.1 and your PC has a Windows 8 recovery partition, resetting your PC will restore Windows 8. You’ll need to upgrade to Windows 8.1 after the reset has finished.
All of your personal files will be deleted and your settings will be reset. All apps that you installed will be removed. Only apps that came with your PC will be reinstalled.
Swipe in from the right edge of the screen, tap Settings, and then tap Change PC settings.
(If you're using a mouse, point to the lower-right corner of the screen, move the mouse pointer up, click Settings, and then click Change PC settings.)
Tap or click Update and recovery, and then tap or click Recovery.
Under Remove everything and reinstall Windows, tap or click Get started.
Follow the instructions on the screen.
You'll be prompted to choose whether you want to erase data quickly or thoroughly. If you choose to erase data quickly, some data might be recoverable using special software. If you choose to erase data thoroughly, this will take longer but it makes recovering data far less likely.