Several things to try:
1. Boot into Safe Mode and do a system restore.
2. Refresh or reset Windows using the method from the user manual.
3. Refresh or reset Windows using the recovery drive you made (if you did)
4. Refresh or reset Windows from the disc or USB stick you can make with the Windows Media Creation Tool (google that).
Finally, remove administrator rights from your brothers account on your laptop, then he can't do such harm again. And make that recovery drive (see http://www.techrepublic.com/article/be-prepared-create-a-windows-10-recovery-drive/ ).
I went out for a few hours with my friend, left my laptop with my older brother, he started downloading ****. When i turn on my laptop, it doesnt show the log in bar or my icon, plz anyone help if you can, i cant enter troubleshoot screen nor can i log in
Its a Lenovo ideapad 110s windows 10

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