Media Center Extender

I have an X-Box 360. I always try to use the media center extender. I always get an error that tells me to reinstall windows. I don’t care to do that; Is there anything else that I can do?

XP MCE with Rollup update
AMD Athlon 64 X2
1gb RAM
80gb HDD
B/G WLAN
10/100 LAN