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Steam store pages are now required to disclose kernel-level anti-cheat
(steamcommunity.com)
Steam store pages received a new Anti-cheat field. Disclosure is mandatory for kernel-level anti-cheat solutions. And recommended for other anti-cheat solutions (like server-side or non-kernel-level client-side).
The field discloses the anti-cheat product, whether it is a kernel-level installation, and whether it uninstalls with the product or requires manual removal to remove.
the kernel level part of that specific thing is preventing process startup after it was killed