Hi ivanhar,

If you are trying to reinstall the operating system using the media disks shipped along with the system, it should not be asking for a product key during the installation. For installing Windows, you may refer to the link: http://dell.to/13nXHsM.

Hope this helps. Please feel free to reply for any further assistance.

Sadly, no. I did not install Windows from my media disk - unfortunately it's corrupted and unusable. I used Windows AIO and installed the version that my laptop has Product Key for, but I can not read all the chars. So can anyone from Dell confirm that I am using this laptop via my Service Tag and give me the Key? Or I dont know - is there anyway at all ?

The Dell Windows 7  Home PremiumReinstallation DVD uses system locked preinstallation; it inputs a generic 25 digit product key which verifies whether the system is a Dell system with a verified BIOS for that particular version of Windows and activates or not accordingly.

There is a program called Activation Backup and Recovery; it can be used to backup the System Locked Preinstallation activation which can later be restored. I have backed up the system locked preinstallation from all the Dell Reinstallation DVDs. See Windows Reinstallation Guide/A Clean install of Windows 7 Step 2 and Step 11b for more details.

http://philipyip.wordpress.com/dell-community-forums/ 

Hi ivanhar,

Unfortunately there is no way to get the product key that is at the sticker on the system. If the system is not covered under warranty and you are residing in the US, you can contact dell spares at 1-800-372-3355 for OEM media.  If the system is covered under warranty, you may provide me the Service Tag and the name as it appears on the account via private message (click my username and then click Start Conversation) so I may access your records and check for further course of action.

Please feel free to reply. I will be glad to assist further.