|First, Restart the computer in Safe Mode with Networking (Restart the computer and press F8 ans select Safe Mode with Networking).|
Delete all temporary files, temporary internet files and prefetch.
Start > Run type Temp and click OK and delete all files.
Start > Run type %Temp% and click OK and delete all files.
Start > Run type prefetch and click Ok and delete all files.
Now, You should scan your computer with Malwarebytes. It must be updated.
Now, you optimize internet explorer.
Open internet explorer and go to "Tools" menu > Internet options.
In general tab > delete cookies > delete files > Clear history or delete all.
In security tab > click on default level.
In content tab > Clear SSL.
In advanced tab > Click on restore default.
Restart the computer and now , you should check computer in normal mode.
If problem still same then you should try to uninstall and reinstall IE 7.