Please copy your system info from MC Help and paste it here.
As requested, I've pasted in the system info below
Media Center Registered 10.0.173 -- C:\Program Files\J River\Media Center\
Microsoft Windows XP Workstation 5.1 Service Pack 2 (Build 2600)
Intel Pentium 4 2773 MHz MMX / Memory: Total - 2095 MB, Free - 1194 MB
Internet Explorer: 6.0.2900.2180 / ComCtl32.dll: 5.82 (xpsp_sp2_rtm.040803-2158) / Shlwapi.dll: 6.00.2900.2627 (xpsp_sp2_gdr.050309-1648) / Shell32.dll: 6.00.2900.2620 (xpsp_sp2_gdr.050225-1820) / wnaspi32.dll: 4.60 (1021) , ASPI for Win32 (95/NT) DLL, Copyright © 1989-1999 Adaptec, Inc. / Aspi32.sys: 4.60 (1021)
Ripping / Drive D: PLEXTOR DVDR PX-716A Mode:Normal Type:Auto Speed:Max
Digital playback: Yes / Use YADB: Yes / Get cover art: No / Calc replay gain: Yes / Copy volume: 32767
Eject after ripping: Yes / Play sound after ripping: No
Burning / Drive D: PLEXTOR DVDR PX-716A Addr: 3:0:0 Speed:48 MaxSpeed:9 BurnProof:Yes
Test mode: No / Eject after writing: Yes / Direct decoding: Yes / Write CD-Text: Yes
Use playback settings: No / Normalization: None