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Deactivate Windows Defender / Firewall

If you are running Windows 10 on an isolated VM or retro PC with less than 500MB of memory, you may realize that most of the memory is actually used by Defender and Windows Firewall compononents. There is a way to entirely disable these components and prevent them from loading into memory on boot. This is a terrible thing to do, but the following will save you a few hundred megs in RAM usage.

Warning: You shouldn't continue from here unless you really know what you're doing. Don't do this if you are on a multi-user network or when directly connected to the Internet. Be careful with downloads!

Disable SecurityHealthService

Run „regedit“.

Change the parameter for „Start“ from "2“ to "4“.

Careful: This value likes to revert every now and then after feature updates.

Disable Windows Defender Antivirus

Windows 10 Pro: gpedit.msc

Computer Configuration -> Administrative Templates -> Windows Components -> Windows Defender Antivirus
[x] Deactivate Windows Defender Antivirus (German: Windows Defender Antivirus deaktivieren)

Windows 10 Home: regedit.exe

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender
New DWORD: DisableAntiSpyware = 1
New DWORD: DisableRoutinelyTakingAction 1

Disable Windows Defender Firewall

Run Windows Firewall, disable Windows Defender Firewall for all network types

Disable Security Notifications

Go to Settings -> System -> Notifications -> Disable Security Notifications

windows10-lowmemory.txt · Last modified: 2019/09/23 16:24 by chotaire