

Select Windows Defender from the list -> Select the Scan option.

Go to the Start menu -> Type ‘Defender’ (without quotes) into the Search box.To employ Windows Defender in Windows 7, take these steps: To check if your PC is malware-infected, you can make use of your main antivirus or the built-in Windows Defender solution. If the first method has not helped you, it is time to check your system for malware – especially if you can observe these symptoms besides the annoying ‘You need permission to perform this action’ notifications. If doing so resolves your issue, report it to your vendor or consider switching to another antivirus product. To begin with, you should temporarily disable your non-Microsoft security solution, as it might be the culprit.
