If you have not already done so, create a set of system recovery discs. If a problem occurs during the upgrade process, you can use recovery discs to return your computer back to its original software configuration. If you cannot find your recovery discs, see Using HP Backup and Recovery Manager
You can use Microsoft Backup and Restore Center or Microsoft Windows Easy Transfer to back up your Windows files and transfer them to Windows 7. Windows Easy Transfer is compatible with XP, Vista, it comes with Windows 7 and Microsoft has provided updated versions of Windows Easy transfer for Vista and XP that makes backing up files easy.
When finished, verify that the backup was successful and that you can access your files.
If you want to backup your files using other software, you must first verify that it is compatible with Windows 7 before using it. You will also need a copy of the software's installation files on a USB drive or disc. Do not use backup software that is not compatible with Windows 7!