Hello again - you'll get eactly the same answer here as I gave you in teh Answers forums
Computers that come pre-installed with Windows from large manufacturers usually come with two Product Keys.
OEM SLP: This is the key that came in Windows (from the factory). It works by connecting to a BIOS flag (the SLIC table) found only on computers from that Manufacturer. Once it sees the correct BIOS flag, it self activates.
COA SLP: This is the key seen on the sticker located on the side, bottom or in the battery compartment of your machine. The purpose of this key is to be used in the case the OEM SLP self-activation stops working for whatever reason.
the Key you need to enter is the one from the COA sticker on the case - see here for examples...http://www.microsoft.com/en-gb/howtotell/Hardware.aspx
The way to enter it into your current install is either
1) use the Change Product Key link at the bottom of the System Properties page.
2) Click on the Start button, then type in the Search box, SLUI 3
and hit the Enter Key.
both will bring up the change key wizard which will take you through the process, and attempt to activate.
You may need to activate by phone....
telephone activation (operator calls)
Click on the Start button
in the Search box, type
and hit the Enter key
follow the instructions, but when asked which service you require by the telephone ansafone, do NOT reply - this should force an operator to respond, who can deal with you