Kaspersky protects its registry keys from modification. If you try to edit them while KES is running normally, it will block you.
Restart your computer normally. When you try to uninstall Kaspersky Endpoint Security now, the password prompt should be gone. remove kaspersky endpoint security without password
Removing Kaspersky Endpoint Security without a password can be challenging and may have implications: Kaspersky protects its registry keys from modification
Open kavremvr.exe , accept the license agreement, and enter the security code shown in the image. accept the license agreement