Ok, so its evident that this issue raises intermittently. . .
So I would suggest you to create new user profile on windows with Admin rights and check the status of the scan in the new account!
Please find the steps here to create new user account :
To open User Accounts, click the Start button , click Control Panel, click User Accounts and Family Safety, and then click User Accounts.
Click Manage another account. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
Click Create a new account.
Type the name you want to give the user account, click an account type, and then click Create Account.
Right on any fie and check the status of the Right Click Scan Option!