You can right-click the display during playback and use the "DirectShow Filters > Copy graph info to clipboard" command and paste the info into your reply.
If you do that on both machines we can compare the filter graphs.
For example, here is the graph info of a typical Xvid/MP3 avi file on my PC:
Filter Graph Info:
Filter 'Default DirectSound Device'
CLSID: {79376820-07D0-11CF-A24D-0020AFD79767}
Host: C:\Program Files\ReClock\ReClockDS.dll
Input Pin 'Audio Input pin (rendered)'
Connected to pin 'Out' of filter 'ffdshow Audio Decoder'
Major type MEDIATYPE_Audio Sub type MEDIASUBTYPE_PCM, Format type FORMAT_WaveFormatEx
Filter 'Video Mixing Renderer 9'
CLSID: {51B4ABF3-748F-4E3B-A276-C828330E926A}
Host: C:\WINDOWS\system32\quartz.dll
Input Pin 'VMR Input0'
Connected to pin 'Output' of filter 'DirectVobSub (auto-loading version)'
Major type MEDIATYPE_Video Sub type MEDIASUBTYPE_YV12, Format type FORMAT_VideoInfo2
Input Pin 'VMR Input1'
Filter 'ffdshow Audio Decoder'
CLSID: {0F40E1E5-4F79-4988-B1A9-CC98794E6B55}
Host: C:\Program Files\CCCP\Filters\FFDShow\ffdshow.ax
Output Pin 'Out'
Connected to pin 'Audio Input pin (rendered)' of filter 'Default DirectSound Device'
Major type MEDIATYPE_Audio Sub type MEDIASUBTYPE_PCM, Format type FORMAT_WaveFormatEx
Input Pin 'In'
Connected to pin 'Output' of filter 'JRiver Media Proxy Audio'
Major type MEDIATYPE_Audio Sub type Unknown GUID Name: {00000055-0000-0010-8000-00AA00389B71}, Format type FORMAT_WaveFormatEx
Filter 'DirectVobSub (auto-loading version)'
CLSID: {9852A670-F845-491B-9BE6-EBD841B8A613}
Host: C:\Program Files\CCCP\Filters\VSFilter.dll
Input Pin 'Video'
Connected to pin 'Out' of filter 'ffdshow Video Decoder'
Major type MEDIATYPE_Video Sub type MEDIASUBTYPE_YV12, Format type FORMAT_VideoInfo2
Output Pin 'Output'
Connected to pin 'VMR Input0' of filter 'Video Mixing Renderer 9'
Major type MEDIATYPE_Video Sub type MEDIASUBTYPE_YV12, Format type FORMAT_VideoInfo2
Input Pin 'Input'
Filter 'JRiver Media Proxy Audio'
CLSID: {A4207487-E7D8-406B-9882-B66370DE2492}
Host:
Input Pin 'Input'
Connected to pin 'Stream 01' of filter 'AVI Splitter'
Major type MEDIATYPE_Audio Sub type Unknown GUID Name: {00000055-0000-0010-8000-00AA00389B71}, Format type FORMAT_WaveFormatEx
Output Pin 'Output'
Connected to pin 'In' of filter 'ffdshow Audio Decoder'
Major type MEDIATYPE_Audio Sub type Unknown GUID Name: {00000055-0000-0010-8000-00AA00389B71}, Format type FORMAT_WaveFormatEx
Filter 'ffdshow Video Decoder'
CLSID: {04FE9017-F873-410E-871E-AB91661A4EF7}
Host: C:\Program Files\CCCP\Filters\FFDShow\ffdshow.ax
Input Pin 'In'
Connected to pin 'Output' of filter 'JRiver Media Proxy Video'
Major type MEDIATYPE_Video Sub type Unknown GUID Name: {44495658-0000-0010-8000-00AA00389B71}, Format type FORMAT_VideoInfo
Output Pin 'Out'
Connected to pin 'Video' of filter 'DirectVobSub (auto-loading version)'
Major type MEDIATYPE_Video Sub type MEDIASUBTYPE_YV12, Format type FORMAT_VideoInfo2
Input Pin 'In Text'
Filter 'JRiver Media Proxy Video'
CLSID: {A4207487-E7D8-406B-9882-B66370DE2492}
Host:
Input Pin 'Input'
Connected to pin 'Stream 00' of filter 'AVI Splitter'
Major type MEDIATYPE_Video Sub type Unknown GUID Name: {44495658-0000-0010-8000-00AA00389B71}, Format type FORMAT_VideoInfo
Output Pin 'Output'
Connected to pin 'In' of filter 'ffdshow Video Decoder'
Major type MEDIATYPE_Video Sub type Unknown GUID Name: {44495658-0000-0010-8000-00AA00389B71}, Format type FORMAT_VideoInfo
Filter 'AVI Splitter'
CLSID: {1B544C20-FD0B-11CE-8C63-00AA0044B51E}
Host: C:\WINDOWS\system32\quartz.dll
Output Pin 'Stream 00'
Connected to pin 'Input' of filter 'JRiver Media Proxy Video'
Major type MEDIATYPE_Video Sub type Unknown GUID Name: {44495658-0000-0010-8000-00AA00389B71}, Format type FORMAT_VideoInfo
Output Pin 'Stream 01'
Connected to pin 'Input' of filter 'JRiver Media Proxy Audio'
Major type MEDIATYPE_Audio Sub type Unknown GUID Name: {00000055-0000-0010-8000-00AA00389B71}, Format type FORMAT_WaveFormatEx
Input Pin 'input pin'
Connected to pin 'Output' of filter 'D:\VideoRec\Episode 12 (20090928).avi'
Major type MEDIATYPE_Stream Sub type MEDIASUBTYPE_Avi, Format type TIME_FORMAT_NONE
Filter 'D:\VideoRec\Episode 12 (20090928).avi'
CLSID: {E436EBB5-524F-11CE-9F53-0020AF0BA770}
Host: C:\WINDOWS\system32\quartz.dll
Output Pin 'Output'
Connected to pin 'input pin' of filter 'AVI Splitter'
Major type MEDIATYPE_Stream Sub type MEDIASUBTYPE_Avi, Format type TIME_FORMAT_NONE