Errors upon converting AVI to Mpeg

[oceanauk]

I am converting AVI files to Mpeg format and sometimes they play fine on Windows Media and other times I get this error message: Does anyone have any ideas?  Many thanks! 

OS: Windows XP Home Edition, SP2
CPU: GenuineIntel, Intel Pentium 4, MMX @ 2400 MHz

Application data:
VmVyc2lvbjogVVVKZFExQlRWbHRFVFVOSFF5c29PU2M1QndBNkpUOCt
MVzk3WjJOck1DRWpQeU1rTTBGeGVIQjBaWE01DQpJbWFnZUJhc2U6ID
A2OTkwMDAwDQpFaXA6IDZEOTEwNzYNCkVheDogNEQ2N0VGRUMNCkVje
DogNkQ5MzAxOA0KRWR4OiAwDQpFYng6IDZCQzA1NjgNCkVzaTogNkQ5
MERFQw0KRWRpOiA5MQ0KRWJwOiAxOTFGMjkwDQpFc3A6IDE5MUYyMzg
NCkVycm9yQ29kZTogDQpGRiwzMSxDMSxEOSxFRCwzMyw0QywyNCw4LD
U5LDY0LEVCLDIsQ0QsMjAsMzMsQzMsMkUsRUIsMSxGLDgzLEU4LDhGL
DMsNDQsMjQsMTgsRjMsRUIsMixDRCwyMCw4RCw0MSw1MCw4MyxFOCw1
MCxCOSwxMiw0RCw0MCwwLEYyLEVCLDEsRjIsQjksMzYsNzAsMC4uLg0
KQ29kZSA9IFsxMTRdDQotIDIwMQ0KLSAwDQotIDIxNw0KLSAwDQotIF
tdDQo+IEM6XFByb2dyYW0gRmlsZXNcV2luZG93cyBNZWRpYSBQbGF5Z
XJcd21wbGF5ZXIuZXhlDQo+IEM6XFdJTkRPV1Ncc3lzdGVtMzJcbnRk
bGwuZGxsDQo+IEM6XFdJTkRPV1Ncc3lzdGVtMzJca2VybmVsMzIuZGx
sDQo+IEM6XFdJTkRPV1Ncc3lzdGVtMzJcQURWQVBJMzIuZGxsDQo+IE
M6XFdJTkRPV1Ncc3lzdGVtMzJcUlBDUlQ0LmRsbA0KPiBDOlxXSU5ET
1dTXHN5c3RlbTMyXFVTRVIzMi5kbGwNCj4gQzpcV0lORE9XU1xzeXN0
ZW0zMlxHREkzMi5kbGwNCj4gQzpcV0lORE9XU1xzeXN0ZW0zMlx3bXA
uZGxsDQo+IEM6XFdJTkRPV1Ncc3lzdGVtMzJcbXN2Y3J0LmRsbA0KPi
BDOlxXSU5ET1dTXHN5c3RlbTMyXG9sZTMyLmRsbA0KPiBDOlxXSU5ET
1dTXFdpblN4U1xYODZfTWljcm9zb2Z0LldpbmRvd3MuQ29tbW9uLUNv
bnRyb2xzXzY1OTViNjQxNDRjY2YxZGZfNi4wLjI2MDAuMjE4MF94LXd
3

[PvtSniper]

this is with media player this error message? personally i don't like media player, it crashed wen i tried to add my large media library so bye i said to it lol, what version do you have, i believe 9 is latest version 10 on xp, try checking for updates etc. also there are a few free media players u can download, one i like is called VLC Media Player, hope this helps, snipe!