Hello, I wasn't sure where to post this. If I have posted this in the wrong section please let me know. I was recently given a laptop pc as a present. The prior owner knows little to nothing about computers and bought it from a sales person at Best Buy a while back having been told it was the latest thing. It is the HP Paviolion Touchsmart Tablet Laptop ( tx2000 or tx2500 ). Outside on the case near to the screen it says the number is tx2000, but when I look in Control Panel > System > General it says the system is tx2500. How can it be both? Does this mean the laptop was tampered with at some point? How can I find out which model it really is? I'm looking to do some upgrades but need to know the model number. Thank you for taking the time to read my question. Any replies would be a great help.