Limited or no connectivity

[Killa-Eyez]

Ok, let me put it differently, there is no router present in this matter. Nor a hub or switch or any other device. It's either directly connected from modem to laptop or modem to pc. I use the same cable for both, and internet works fine on the laptop, wich means it's not the cable. Also put the modem on standby and when you do that you're supposed to get 192 IP from the DHCP built in the modem but not even that works. IP stays 169.254.

Edit: Okay, suddenly 2 other posts appeared...
Moving on, I worked at my ISP at the THD (Technical Helpdesk) and I've learned that each modem can store a max of 3 MAC adresses and assign each their own IP adress. Even though I only use 2 PC's in this house, if you leave the modem offline (no power) for 30 sec. it resets all the MAC's stored in the modem and three new MAC's can be stored again. Been there, done that. Allthough this method might have been changed since the fuse of several other ISP's. The company's called Ziggo now, while before was named Casema and before that Wanadoo. I still think it has something to do with the IRQ's, changing cards from slots might help I think, or setting the IRQ's manually in the bios. I only need correct configurations... But first I think I'll reinstall Windows. Or maybe there are other recommendations?