The windows 7 product code number is worn off. How can I get it?

How to activate Windows 7 manually (activate by phone)

1) Click Start, and in the Search box type:   slui.exe  4

2) Next press the 'ENTER' key

3) Select your 'Country' from the list.

4) Choose the 'Phone Activation' option.

5) Stay on the phone (do not respond to any of the automated prompts) and wait for a person to help you with activation.

6) Explain your issue clearly to the support person.

as noted above if you use OEM recovery media (recovery partition or OEM recovery disks) no key is necessary as the OEM SLP key is embedded. you can order recovery disks from your manufacturer.

additional info:

Computers, which are built by large manufactures that come with Windows Pre-Installed, come with two (2) Product Keys:

A)   OEM SLP: This key comes pre-installed in Windows, when it comes from the Factory. This key is geared to work with the special instructions found only on that Manufacturer's computer hardware. So when Windows was installed using the OEM SLP key (at the factory) Windows 7 looks at the motherboard and sees the special instructions and Self-Activates. (that's why you did not need to Activate your computer after you brought it home)

B)    COA SLP: This is the Product key that you see on the sticker on the side (or bottom,[ or inside the battery compartment]) of your computer. It is a valid product key, but should only be used in limited situations (such as if the OEM SLP key stops self-activating for whatever reason). The key must be activated by Phone. (Note: All manufacturers that use the OEM SLP system are required by contract to include a Certificate of Authenticity (COA) sticker, that has a COA SLP key, on the computer)