Windows 7: Oh dear what have they done, RC is broken in places

Oh dear what has Microsoft done... I have used the beta since it came out without major issue but, now with a clean install of the RC I find I simply cannot work with it. I have had to go back to Vista only.
The reason - can't get logged on to our network at work nor can I get User Account Control to open.
Here is what I need and what I did;
I need to be able to logon to our LAN, I made sure all details that are required and worked for the beta of 7 were there and indeed I can get onto the Internet but, when I try to Map a Network Drive I keep getting a message saying no such user exists on the Domain. I have made sure the Domain is correct, etc, etc, but, no amount of trying gets me past this message. I have consulted our in-house PC officer and he does not know any more than myself about this.



I wanted to get into the User Account Control applet but, when I click on the Link in Control Panel the waiting cursor does just that - it waits. Never changes and the applet never opens.

Come on guys, I mean how can you break something in a RC when it was working well in beta??

Having been computing and installing systems for many years now, I'm glad I have Ubuntu to fall back on at home - it just works!!

just with u, we have no such problems, we are on 7137, RC has some problems but not as u say... Where did u download the RC from... Check the ISO with Hash numbers and try to burn on different media and try to re-install...

See if another 'clean install' will work this time around, or try clearing your DNS cache.

You could also try clearing the ARP cache:
Freeware - ARPCache Viewer
ARPCache is a secret, undocumented section of the registry used to store
information for Add/Remove Program items in the latest versions of Windows.
If you open Add/Remove Programs in the newer versions of Windows, you will
notice that certain information has been added, such as, size, frequency of
use, and last used on. This data is kept in binary files in the ARPCache of
the registry, which means that even if you know where it is in the registry,
you probably will not be able to read it. ARPCache Viewer deciphers the
binary files and shows you what is in each entry

I haven't tried this in Windows 7, so I don't know if this works or not.