The registry key that holds the changes that needs to be made can be found here:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\OEMInformation
Note: If this key does not exist, you can download the following
registry file, which you will want to edit before double-clicking to add into the registry.
full guide available here:http://www.howtogeek.com/howto/windows-vista/customize-the-manufacturer-support-info-in-windows-vista/
You can modify the following fields and put any values you’d like into them, with the exception of the Logo key, which you probably shouldn’t change.
* Manufacturer
* SupportHours
* SupportPhone
* SupportURL
* Logo
he last important step is to either create or modify a bitmap file stored at the location specified in the Logo key, usually set to:
C:\Windows\System32\oemlogo.bmp
For best results, you’ll want to use a small logo file, preferably somewhere around 100×100 height/width. Also note that copying the file to that folder will require administrative permissions.