i havent hurd any reports of similar problems to comapir this with, but lets walk though a few questions to help us resolve it.

1. your refering to downloads and uploads .. i asume that this is all with mIRC's dcc send and get ? and not other programs or a script?

2. are you running the latest version of mIRC? if not i sugest u upgrade to 6.15, which can be downloaded from www.mirc.com

3. are you running a script? if so try disableing the remotes and then download a large file and see if it still does it.

4. do other non mIRC related things lock up your computer also regularly?

thats a start.

Cobra^