ShadowCopyView is a portable tool that will list the snapshots of your hard drive created by the 'Volume Shadow Copy' service of Windows.
Each of these snapshots contains a previous version of your files and folders from the snapshot creation date. You can browse this older version and copy them into a folder on your disk.
This little utility can come in handy when you, perhaps, installed a faulty driver that is causing system issues, and, for whatever reason, you are not able to roll back to your previous state. ShadowCopyView will easily allow you to access those older drive snapshots.
Using ShadowCopyView allows you to view all the shadow copies, including those omitted by Windows. Additionally, the 'Previous Versions' window doesn't allow you to access copy system files unless UAC (User Account Control) is turned off. ShadowCopyView is executed with full admin rights (elevated process), so you can access and extract any file you need.