Error while Registering windows 7

villival,

Thank you for using the Dell Community Forum.

If you have trouble activating Windows 7 open the Windows Activation Wizard while in Windows 7 to use the phone and activate Windows:
While installing Windows 7 at the enter your product key page, do not enter your key and uncheck "Automatically Activate When Online"
1. When you have reached the desktop, Click Start, then in the Search box type:  slui.exe 4
2. Press Enter on your Keyboard
3. Select your Country.
4. Select the Phone Activation option, then call and hold for a real person.

Activate Windows 7 By Phone