I found out that my DNS Suffix Search List is not in effect even though i clearly entered it in tcp/ip properties. 

Solution:

I had to enter the DNS Suffix manually in the registry key :

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\DNSClient]"SearchList"="dnsuffix"

You may easily disable CD Drive, USB Drives and removable storage devices using Group Policy. IT administrators may want to disable removable storage to enhance security and prevent information theft.

You can disable removable storage within below settings:
User Configuration\Policies\Administrative Templates\System\Removable Storage Access

Error: "The specified domain either does not exist or could not be contacted" error when running dcpromo on Server 2008

Solution: Of course everyone will tell you to check the network coneectivity, DNS, etc. In my case, i had no Global Catalog within the domain. So i promoted one of the DCs to GC and it statrted working.

Server 2008 Error: The IP address  you have entered for this network adapter is already assigned to another adapter Name of adapter. Name of adapter is hidden from the network and Dial-up Connections folder because it is not physically in the computer or is a legacy adapter that is not working. If the same address is assigned to both adapters and they become active, only one of them will use this address. This may result in incorrect system configuration. Do you want to enter a different IP address for this adapter in the list of IP addresses in the advanced dialog box?

Solution:

1.Run, "set devmgr_show_nonpresent_devices=1" from command line
2.Start "Device Manager", Right click and choose "Show Hidden Devices"
3.Browse to Network Adapters, then remove all the old adpaters.

I get the following error message when i try to join  Windows 2003 R2 SP2 to domain:
The following error occurred attempting to join the domain "mydomain": The account is not authorized to login from this station.

Solution: On the Window 2003 Server go to Control Panel - Administrative Tools
Open Local Security Policy.  Expand Local Policies to select Security Options.  Change the following setting to DISABLED:
Microsoft network server: Digitally signed Communications (if server agrees)

Also see MS KB281648