Hi,
To use the system restore Wizard, open the Help and Support application form the start menu and type "system restore wizard" into the search box.From the displayed results click on the link titled "Run the system restore wizard".
Follow the on screen prompts from the wizard to restore your system to an earlier state. Note, that any applications or drivers that you have installed since the restore point will be disabled. It may also be necessary to roll the system back to the penultimate restore point for satisfactory operation.

Please note that your personal data, e-mails, contacts, buddy lists and applications will be deleted when this system restore procedure is complete. You should back your data up before continuing.

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