There maybe some gremelins in ur system still. I think the 1st idea is to password protect that pc for your pc's safety & all ur documents!
Download this software >> click here and double click the .exe file & remove all the items in red after you have completed the scan.
Another good idea is to run Malwarebytes >>click here
When scanning with Malwarebytes be sure to do a full scan & to run in either safe more or drop the internet connection.
Best of luck !