Looks like a corrupted user account. Login to your spare admin account, make a new account for daily use, transfer your files to it and delete the old one.
Ever since I did a scan on my computer's OS (C:) my PC always resets or does some weird thing where its hidden all my applications in random areas. I try resetting it or shutting it down then turning it back on, then I sign in and it pops up with 'Preparing Windows' it happens every time and it changes my desktop background and acts as if its my first time using it... Please respond with help people ?o_o