I was trying to do a remote desktop using “mstsc /console” to my Windows 2003 server this early morning and realised it does not connect to the session 0 (aka console) of my windows 2003. Searched the microsoft support site and found this. The /admin switch is introduced in RDC 6.1. RDC 6.1 is included in the following operating systems: Windows Server...

After you create Windows XP Service Pack 3 slipstreamed media, your product key is not accepted. Source