1. Backup ALL your important data. Your documents, music, application settings, everything. The whole of your user folder. All your fonts. Anything you'll need.
2. Download the installers for ALL the programs you will want to reinstall. Everything. (If you read my informer articles you should have already done this -.- ). Put them on whatever backup medium you choose (backup hard drive is the best option).
3. Once you are sure you are ready to continue, follow the instructions in here:
http://h10025.www1.hp.com/ewfrf/wc/gene ... =c00814731
Remember, following the instructions therein will wipe your hard drive. Make sure you have backed up.
I would recommend getting a backup hard drive. Anyone on RSBandB who does have one will know they are an invaluable asset. The Western Digital 'My Book' series are good. Have a look on Amazon or something.