Windows XP unable to browse the workgroup computer. Cannot even the other computer using computer/NetBIOS name.
If try to run "nbtstat -c: or "nbtstat -r" from the command prompt, the follow error message shown:
Failed to access NetBT Driver - NetBT may not be loade

The registry key HKLM\SYSTEM\CurrentControlSet\Services\NetBT\Parameters\TransportBindName might be blank. Set it to "\Device\" and then reboot the computer
Issue / problem:
Unable to change or remove the default Search Provider for Internet Explorer. It will not work even though you tried to modify or add-in new search provider from http://www.ieaddons.com/en/searchproviders
Cause:
Spyware or adware that modified the Search Provider and restricted the registry permission
Using Disk Image Cloning (e.g. Symantec Ghost) for mass desktop rollout/deployment can significantly saves hours of work and hassle over other rollout method but it might cause major network problem if every cloned system has an identical Computer Security Identifier (SID). This fact compromises security in Workgroup environments, and removable media security can also be compromised in networks with multiple identical computer SIDs.