I think I had a K-Lite-CODEC-Pack installed on Win XP.

On my Windows 7 machine I didn't install any CODEC just using the standard ones.

We used:

Format : AVI
Info : Audio Video Interleave
Family : RIFF
File size : 2.44 MiB
PlayTime : 12s 840ms
Writing application : Lavf50.6.0

Video #0
Codec : xvid
PlayTime : 12s 840ms
Width : 1024
Height : 768
Aspect ratio : 4/3
Frame rate : 25 fps

Audio #0
Codec : MPEG-1 Audio layer 3
Family : MPEG-1
Info : MPEG-1 or 2 layer 3
Codec profile : Joint stereo
PlayTime : 12s 868ms
Bit rate : 192 Kbps
Bit rate mode : CBR
Channel(s) : 2 channels
Sampling rate : 44 KHz
Resolution : 16

We also had the problem in this constellation:

Format : AVI
Info : Audio Video Interleave
Family : RIFF
File size : 15.3 MiB
PlayTime : 1mn 1s
Bit rate : 2099 Kbps

Video #0
Codec : XviD
Family : MPEG-4
Info : XviD project
PlayTime : 1mn 1s
Bit rate : 675 Kbps
Width : 1024
Height : 768
Aspect ratio : 4/3
Frame rate : 25 fps
Resolution : 8
Chroma : 4:2:0
Interlacement : Progressive
Bits/(Pixel*Frame) : 0.034
Writing library : Lavc52.34.0

Audio #0
Codec : PCM
Family : PCM
Info : Microsoft PCM
Bit rate : 1411 Kbps
Channel(s) : 2 channels
Sampling rate : 44 KHz
Resolution : 16

But I'm quite sure that we had the same also with a standard windows CODEC:

Format : AVI
Info : Audio Video Interleave
Family : RIFF
File size : 127 MiB
PlayTime : 55s 800ms
Bit rate : 19134 Kbps

Video #0
Codec : MS Video
Info : Microsoft Video 1
PlayTime : 55s 800ms
Bit rate : 18766 Kbps
Width : 1024
Height : 768
Aspect ratio : 4/3
Frame rate : 30 fps
Bits/(Pixel*Frame) : 0.795

Audio #0
Codec : ADPCM
Family : ADPCM
Info : Microsoft ADPCM
PlayTime : 57s 524ms
Bit rate : 355 Kbps
Channel(s) : 2 channels
Sampling rate : 44 KHz
Resolution : 4

But I'm not 100% sure with the last one.

Regards,
Pegamode.