There's no such file on my XP and its a new installation.
Can you press Winkey+F and paste br_rt.dll into the search filename section that appears. Then under "lookin" click browse from right at the bottom, and navigate to C:\WINDOWS and press OK. Click Search to begin the scan. Let us know what you find and be sure to make a note of all of it including its path (location address).
Note: Winkey has the windows logo on it near Alt.
Can you press Winkey+F and paste br_rt.dll into the search filename section that appears. Then under "lookin" click browse from right at the bottom, and navigate to C:\WINDOWS and press OK. Click Search to begin the scan. Let us know what you find and be sure to make a note of all of it including its path (location address).
Note: Winkey has the windows logo on it near Alt.