For each license purchased, you will be allowed to ask for 2 registration numbers (one for work, and one for home). You can get your second registration number here. If you reformat your hard drive, or if you buy a new computer, then your computer number will change, and you will need a new registration number. Our customers can ask for a new registration number at any time. But our system only allows you to ask for two new registration numbers every 14 days per purchase. New computer number Email address      Your email address is your key to our database. If your email address changes, and you need a new registration number, you will first need to give us your new email address by using the Change email page. Please double check your details before submitting. Any spelling mistakes or other errors may cause long delays.