This option is deprecated, use /UseUpdateService instead.
The bypass_wsus option bypasses any configured WSUS and forces WuInstall to access the Windows Update site.
If a WSUS is configured, WuInstall changes the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU, Value UseWuServer from 1 to 0, which means that no WSUS should be used.
If you type
WUInstall.exe /search /bypass_wsus
and a WSUS is configured, the output is:
After the execution of WuInstall, resetting the UseWuServer value to 1 restores the initial state.
When the execution of WuInstall is aborted for some reason before WuInstall can reset the registry value, it has to be reset manually!
The /use_wsus option works similar to the /bypass_wsus option, but you can specify another WSUS, which is valid during the execution of WuInstall (or it allows you to switch from no WSUS at all to a certain WSUS).
WuInstall manipulates the following registry keys:
and stores the initial values for resetting them after WuInstall has finished.
For example, if you have WSUS configured, and want to go to the WSUS , you type:
WUInstall.exe /search /use_wsus
and WuInstall puts out:
After the execution of WuInstall, the initial state is restored (in this example, the WSUS is reset to http://mywsus.local:8530)
When the execution of WuInstall is aborted for some reason before WuInstall can reset the registry values, they have to be reset manually!
When an error occurs while trying to install an update using WSUS, WuInstall automatically tries again to install the updates bypassing the WSUS using Microsoft Update.
When an error occurs while trying to install an update using WSUS, WuInstall automatically tries again to install the updates bypassing the WSUS using Windows Update.