mIRC 6.35 works fine for me on Windows 7 (along with every other person I know who has windows7).
Did you dl directly from mirc site? Have you tried re-downloading and re-installing with your antivirus or firewall off?
Are you fully updated with Windows 7 as well?
Have you scanned your pc for viruses?
Last edited by flowrush; 20/02/10 04:32 PM.