- [Instructor] Microsoft Defender Antivirus
can help defend against malware on your computers.
This might include computer viruses,
computer worms, Trojan horses,
ransomware and spyware.
It's important to try to avoid malware.
And you can help protect against malware infection
by following these fairly straightforward guidelines.
Obtain software only from reputable sources.
Keep your operating systems up-to-date.
Install and enable anti-malware software.
Ensure anti-malware definitions are up-to-date.
Be cautious, educate your users
about what might be suspicious,
and always maintain a suspicious posture.
In the demonstration, I'm going to show you
how to perform a quick scan,
how to perform a custom scan,
and how to detect malware and remove that malware.
On my Windows 10 computer,
I'm gonna load the Windows Security app.
This app provides a consolidation point
for all things security.
So on the homepage, for example,
you've got a security summary at a glance
and you can see if there's any issues
that need your attention.
So for example, under virus and threat protection,
I can see an exclamation point,
which probably means I need to check out an issue.
It looks like I need to set up OneDrive.
I'm gonna just dismiss that for the time being.
To investigate virus and threat protection
in more detail, select the virus and threat protection tab.
And from here you can select quick scan.
That will scan common areas for threats
and create a report for your review
(indistinct).
If you want, you can perform
a custom scan by selecting scan options
and then choosing a full scan
of absolutely everything on your hard drive
or you can choose custom scan
and then perform or select scan now.
It will then ask you which folder you want to scan.
Again, I'm gonna select cancel
because I don't have a lot of content on this video.
The next thing I want to do is introduce a test file,
which contains code or text, rather,
that looks suspicious
and will probably generate a message
and isolate a file or quarantine a file.
So to do that, I'm gonna open up File Explorer
and navigate to my local hard drive.
I have a file here called Suspicious.
Not all malware-containing files are labeled in this way.
If I select this file
and I remove the element to the side
of the suspicious text
and save the file,
I get immediately a virus and threat protection
it recognizes that as being a problem.
So I can now click on that notification.
It tells me of the nature of the threat.
I can choose to remove the file,
I can quarantine it so I can review it later,
or I can decide that no, actually,
this is a perfectly legitimate thing.
So I'm going to choose to remove the file in this case,
and that action's being performed very quickly.
If I want to review the protection history,
I can do that by selecting protection history here.
So I can have a look at each of these threats.
Now because I'm signed in as a standard user,
I don't have full access.
So I'm just gonna sign in as the local admin.
I've cunningly created an admin account
with no password, which obviously is not great practice.
Anyway, here we are.
We can see the threat was quarantined
at a particular point in time.
Here's some details about that.
And then I can have a look at restoring that file
or removing information.
So as an administrator, I can say no,
I can recover this,
the user inadvertently selected
to remove the file or to quarantine the file,
I can override that action.
In the demonstration, you learned
how to perform a quick scan,
how to perform a custom scan,
and how to respond to the detection of malware
and optionally remove malware.