Have you seen certain software, eg Nero 8, Roxio 10, selling way below their RRP prices.
These tend to be digital downloads, where you receive and email with a serial number and a link to the Trial download.
I was taken in, and bought Nero 8 for £7.99.
Very quickly, the serial number and link were supplied in an email.
Serial number entered, and hey presto, all is fine...
Or so I thought.
When I tried to watch a DVD with Nero Vision, it needed to be activated.
No problem I thought. 1 minute later, it reports that I have a pirated serial number.
Nero will work, but only for about 30 days. After that, certain functions will become disabled.
Now, unless you have tried to watch a DVD etc with Nero Vision, you will not be aware you have a pirated serial number until Nero requests and activation.
If you have bought Nero 8 at a price "Too good to be true." I would suggest to try and watch a DVD, or an AVI/MPEG movie via Nero Vision. It will require activation. If there is a problem with the serial number, Nero will advise.
Whatever you do, Nero will rquire activation after 30 days.
If you have received what a appears to be a pirated number. Contact the seller, and if that is no good. Try eBay or Paypal.