Backed Up, Wiped data, and when I was setting up my Google account, AT told me of a new update (Does that happen every time? If so, thieves might see that and, well...) Anyways, that reminded me of hard-reset-proof settings, lovely indeed; time to update! Started downloading, but on the meantime the screen locked and when i was back to it, the scan had reset. And it reset again when screen turned from portrait to landscape; makes me think the lockscreen wasn't the problem in the first case but that it turned around while locked. Now, after choosing the installation mode (Rooted one), I selected "Install" and got a message in german when my settings are actually in english (Fix please!).
AND FINALLY, after rebooting my phone, I tried the "Simulate Lock" thing, which, once again, didn't work :/.
Just realized something: If I "simulate lock" and go back to home, it force closes after the 10 seconds that were intended for the lock, while if I stay on the UI of the app, it says that the simulation has succeeded.