Hello peolpe

I'm helping a friend out but we keep getting dropped frames. He is running both win98 and 2000 so we went in to 98 and closed all prgrams down exept exlore and vdub, and hurra we didn't get any dropped frams.
But there is a 4Gig limmit in 98 and we tuned to 2000 and there it started dropping frames, so we went into the taskmaneger and closed all things down exept vdub and that controling program and it just loked up, are there any programs that have to be open?

He has a 900Hz computer and a Pinnacle PCTV Pro capture card using Huffyuv codec.

Also he can't capture higher then 352x288 with both preview and overlay of...any ideas to solw this?