When? When using systems with a snapshot and the Active Directory requires updating the computer account password.
Why? Active Directory is normally configured to have the computeraccounts updated every 30 days for security reasons. This policy can be changed, but sometimes you don’t have the control over this policy.
Tooling? In Windows 7 and Windows 8 the command “nltest” is part of the operating system. On older versions it is located in the Resource Kit.
To detect whether you’re computer is running with a BIOS or UEFI, type the following command:
reg query HKLM\System\CurrentControlSet\Control /v PEFirmwareType
The following results codes are available:
Depending on the BIOS or EFI the hard disk partitioning will use MBR (with BIOS) or GPT (with UEFI) when installing Windows 7 /8.
More information about the difference between GPT and MBR can be found on the Wiki pages:
GPT = GUID Partition Table (http://en.wikipedia.org/wiki/GUID_Partition_Table)
MBR = Master Boot Record (https://en.wikipedia.org/wiki/Master_boot_record)
Normally when UAC kicks in, the network connections are reset because it is an another session. To have the same network connections after the UAC prompt is passed, you have to enable LinkedConnections. THis can easily be done in the registry.
Windows Registry Editor Version 5.00
Or download here
More information: http://support.microsoft.com/kb/937624