
Microsoft recommends using DISM not WUSA for uninstall
Granted that the servicing stack itself is not really relevant to a problematic specific issue like an LSASS memory leak, but Microsoft nonetheless officially recommend using DISM to uninstall cumulative patches:
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To remove the LCU after installing the combined SSU and LCU package, use the DISM/Remove-Package command line option with the LCU package name as the argument. You can find the package name by using this command: DISM /online /get-packages.
Running Windows Update Standalone Installer (wusa.exe) with the /uninstall switch on the combined package will not work because the combined package contains the SSU. You cannot remove the SSU from the system after installation.
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