Ok I made a boo-boo
Running a registry cleaner (CCleaner to be exact), I deleted som registry files without making a backup.
..I know, stupid..
The only (noticeable) problem I have is that my Wireless Network Connection (Broadcom 802.11bg/ WLAN) is stuck on "Aquiring Network Address", with it's little icon on the right hand of the taskbar being a computer with a yellow ball moving back and forth below the computer.
It's annoying because while the connection is trying to get an ip address, I can use the internet. So something is screwed up.
Here are some facts that (i think) might help:
-DHCP Client (service) disabled
-Network Connection > Wireless Network Connection > Properties > Internet Protocol (TCP/IP) Properties is filled out - with Use the following IP address and Use the following DNS server addresses filled out.