One of my clients went out and bought a cheap HP at Costco last spring which unfortunately has Vista Home Premium on it. It originally connect to the office network which is actually a domain without a problem. That is it couldn't log on the domain, but it was able to use network resources such as shared drives, printers and the Internet. Fast forward six months later and Vista-Home got corrupted taking and update and I was forces to do a HP Reinstall. So this time I go to connect it to the network via wireless and it wont accept the correct IP range from the DHCP servers instead of 192.168.10.x it's going with 192.168.1.103, which works fine for Internet but wont connect to network resources. If I try to force it, it drops the Internet. If I try to connect it via ethernet, it takes the default IP 167., etc.

I changed the workgroup name to my domain name, although don't recall that that mattered.
My user name is an authorized user on the domain and I'm using the same password as the domain logon
I have File sharing turned on
I have the network set to private.
I can successfully ping my 192.168.10.X computers

I'm pulling my hair out here. Upgrading to Vista Business is not an option, as I have to have this system working first thing for the engineer.