List of codecs on my computer

[CJ550]

I've found out through Pinnacle Studio what codecs are on my computer (Wins XP Pro) can anyone let me know if these look ok and if I need to add to them? I'm having problems viewing some videos.

Codecs-

Cinepak Codec by Radins

DivX 6.2.5 Codec (1 logical CPU)

DV Video Encoder

ffdshow Video Codec

Indeo video 5.10

Intel 4:2:0 Video V2.50

Intel Indeo® Video R3.2

Intel Indeo® Video R4.5

Intel IYUU codec

Microsoft H.261 Video Codec

Microsoft H.263 Video Codec

Microsoft MPEG-4 Video Codec v1

Microsoft MPEG-4 Video Codec v2

Microsoft RLE

Microsoft Video 1

Microsoft Windows Media Video 9

PIC Video MJPEG Codec

PIC Video MJPEG Compressor

Pinnacle DCxx MJPEG Compressor

Uncompressed (RGB24)

Uncompressed (UYVY)

Uncompressed (YUY2)

WMVideo Advanced Encoder DMO

X264-H264/AVC encoder

Xvid MPEG-4 Codec

I've looked at other threads about codecs but dont know which codecs to download from the various sites mentioned?

thanks