^ WRONG!
@
edannaclaire, you probably have some drivers which are not signed my microsoft, the whole WHQL mess which is prettly costly for most companies and it's required for ALL divers that load in Win7 in non-testsigning. In this case you need to enable testsigning mode in order to load those unsigned drivers that you require for full functionality.
To remove the watermark just edit the UI file C:\Windows\System32\en-US\user32.dll.mui in a hex editor or resource editor. The path above is for en-US Windows, if you have it in a different language it might be different.
The easier method is to use RedEdit (freeware), load user32.dll.mui, look in string table for the texts you see in the corner and the trick is to replace every character with a space, so that each 1 byte char becomes a 1 byte space not visible on the watermark, all in all the byte scturcture of the user32.dll.mui file mustn't change. Make a note of the file size before the edit and be sure it won't change after the modifications are done.
entry 715 is for %wsWindows %ws
716 for %ws Build %ws
738 for Test Mode
Make a backup of the original file.
Replace the old one with the new one, if it doesn't let you, go to security in file's properties, take ownership and add rights for your user. If the file is locked, use the command line safe mode (F8) to replace the file.
Finally run mcbuilder.exe as an admin in Windows to rebuild the UI cache if it's still showing up and you're done.