Zune software creates a backup of your Windows Phone 7 software before updating the phone software to the latest version so that the user can revert to an earlier version of phone software and settings at any point of time.
If you are encountering problems after updating your Windows Phone 7 software, you can restore the phone to an earlier software version and state with a few clicks. In this guide, we will show you how to restore Windows Phone 7 software to an earlier restore point.
Please note that if you restore to a previous version, you will lose all changes made since the restore point, including all apps you have installed, music you have downloaded, and settings you have changed. And, if you have changed the PIN, you will need to enter your previous PIN to unlock your phone after restoration.
# Connect your Windows Phone 7 device to your PC that you have previously used to update the phone software.
# Run Zune software, click Settings and then click Update to view all available restore points.
# Click on Restore button to begin restoring your device to the previous software version. Accept the statement, and click Next button to begin the process.
# Wait for a while till you see Phone Restoration Successful message. Click Finish button and disconnect your phone.