Windows 7: Dhcp issues and network connectivity issues since windows 7 x64 sp1

I reformatted my computer because after installing service pack 1 and other updates from Feb 14th my computer has been having issues getting a dhcp from my router. I have a windows 7 home premium 32 bit laptop that works just fine. I also have a ubuntu machine that pulls an address from this router and an xbox 360. From what I've read other places online it appears this is a bug with dhcp that appears some time around windows 7 service pack 1 x64. Is this update the one causing issues with the dhcp problems I'm having? Should I uninstall service pack 1 or reformat and not let windows install this? I'm a little confused as to what this problem is. Any help would be greatly appreciated! Thanks!

I've never heard of a service pack creating a DHCP problem.

You might want to try resetting your router either by pushing in the reset button "hold in for ten seconds" or you can reset the router from the router's service page or unplug the router for ten minutes then plug it back in again.

Just because other machines can pick up the DHCP address doesn't mean it's working correctly for all machines. Routers can limp along sometimes but the functionality becomes erratic until you reset them.

Or you can try using the ipconfig commands, such as the ones outlined in the link below.
ipconfig - Windows Command Line Utility