The crackshield taking memory, i can confirm. It doesn't happen 100% to me, but it does happen.
For me, i load crackshield, it pops up in my system tray, and i can launch mabi. Every now and then though, crackshield will show up in the system tray like normal, but i can't double-click it to close it, i can't use task manager to close it, and i can't use task manager with admin privileges to close it. Same for stopping the process.
In these scenarios though, crackshield not only has issues closing, but screws up mabi too. I'll type my account info, and i think after i hit log in and before the second password, it will crash the game. Don't remember what the error was, not testing atm. Only way to close crackshield and play again, is to restart the system and try till it works, in this situation.
I play on a laptop, and use a usb mouse. Optical/wired. When i can play mabi with no issue, and after i close mabinogi, then i have a mouse issue after closing crackshield 90% of the time. Normally, it locks my usb mouse. I can't move it or click to make it do anything. The mouse is just froze. Of the times it freezes, 70%-80% of the time i can slide my finger across the touchpad, and functionality of my mouse is restored. Don't know why, but it works. The other 20-30%, i just have to completely restart the system to get it to work. I haven't actually tried unplugging and plugging it back in yet, didn't think of it till i typed this post and i've not played mabi in like a week.
No other issues come to mind atm, that haven't popped up prior to my windows 10 update. Whether you find the information sufficient or the source credible enough at this point, is up to whoever wants to poke around.