Fromsoft doesn't care about pc players so there's no cheat prevention. Backup your save regularly if you want to play this game because cheaters can do whatever they want.

Edit: nowadays you can use the "Blue Sentinel" mod to protect your save and to kick cheaters (and even glitch abusers). You can find it on nexusmods. Please spread the word about it, ideally everyone should use it as it fixes what fromsoft didn't fix (including a major vulnerability that can potentially let actual hackers fiddle with your pc).

Fromsoft doesn't care about pc players so there's no cheat prevention. Backup your save regularly if you want to play this game because cheaters can do whatever they want. Edit: nowadays you can use the "Blue Sentinel" mod to protect your save and to kick cheaters (and even glitch abusers). You can find it on nexusmods. Please spread the word about it, ideally everyone should use it as it fixes what fromsoft didn't fix (including a major vulnerability that can potentially let actual hackers fiddle with your pc).