Recieved a replacement notebook pc for my Compaq that died (under extended warranty). PC is HP ze 4145, AthlonXP 1800+ 512 mB RAM 40 gB HD. Tried installing my Linksys Wirless G pc card. OS locked up during driver install. Had to power down to get out from t he lock up. On cold reboot with wireless card inserted, I get a boot loop where XP just starts then reboots, Never even make it to the welcome screen. If I pop out the card, boots fine. HAve worked with tech support form linksys for hours to no avail and tech support from teh replacemetn company no help either. Have tried a new PC card and no difference. just got another notebook today in case it was a hardware problem (same exact model) and the same issues. IF I install the drivers with Task Manager up, CPU usage shoots to 100% during driver install and stays there. Cycles all used by "system" (not system idle process). As soon as I pop out the card, CPU usage drops to 2-6% ANy ideas?