The system is now clean, thus, we can check all the other issues.
First, I would like you to uninstall
Avast Free Antivirus. You can install it at the end of the procedure, if you like, but since we are going to work with Windows Security now, I would like to have a possible cause for issues less.
To uninstall Avast:
- Download the Revo Uninstaller (Free Download) and save it on your Desktop.
- Double click on the exe file created on your Desktop to run the installer, and follow the instructions to install the program.
- Double click the program's icon to open it.
- Write in the search area, on the top left, the following program:
- Choose the Uninstall tab from the menu and let the program to create a Restore point.
- Choose Scan, and then the Advanced mode scan.
- Select all the Avast items found, Delete and Next.
- Let the procedure be completed and click on Finish.
- Restart the computer.
Let me know when you are done with the above.