HI :
Reset Internet Explorer settings
You can reset Internet Explorer settings to what they were when Internet Explorer was first installed on your PC. This can be useful for troubleshooting problems that may be caused by settings changed after installation. Note that resetting Internet Explorer isn't reversible, and all previous settings are lost after reset.
Close all Internet Explorer windows. Select the Tools button, and then select Internet options.
Select the Advanced tab, and then select Reset.
In the Reset Internet Explorer Settings dialog box, select Reset.
When Internet Explorer finishes applying default settings, select Close, and then select OK. Restart your PC to apply changes.
Beside this,use adwcleaner from
https://toolslib.net/downloads/viewdownload/1-adwcleaner/and then follow this:
To turn off SmartScreen in Internet Explorer 8
In Internet Explorer, select the Safety button, point to SmartScreen Filter, and then click either Turn off SmartScreen Filter or Turn on SmartScreen Filter.
In the Microsoft SmartScreen Filter dialog box, click OK.
Cordially