- When I log on to my computer remotely with Remote Desktop the local user is locked out.
- When the local user logs in my Remote Desktop session is interrupted.
I want to get rid of this limitation. How?
You need a server version of Windows. This is strictly a licensing issue - regardless of whatever technical hacks are available.
A Windows server will then allow for 2 concurrent RDP sessions in administrative mode, after which you need remote desktop services (terminal services) client/device licenses for more concurrent connections (generally known as TS CALs).
In two words : you can't. This artificial limitation by Microsoft is designed to force you to update to a Server version of the operating system.
However, if you're using XP, you might rollback back one system dll to a version dating to before Microsoft had this brilliant idea. See the two following articles for slightly different instructions on how to do this:
Be careful, and don't forget first to take backups and create a system restore point.
EDIT : Now also for all Windows versions :
Enable Concurrent Sessions on Windows 8.1, Windows 8, Windows 7, Windows Vista and Windows XP