Just read this post fromMiniToolto get more information.
What Is Win32:MdeClass
What is Win32:MdeClass?
It is a virus, which indicates malicious executable files or potentially harmful programs running in the background.

However, it may also be a false positive detection result triggered by incompatible software or driver issues.
Win32:MdeClass virus is mainly detected by AVG/Avast on Windows 8/10, and older versions of Windows 7.
The following are the possible detection names of the Win32:MdeClass virus.

Trojan.Win32.Generic It is a virus tested by Avast detection tools.
Also see:Is Avast Safe?
In most cases, Win32:MdeClass will modify system files, create folders, and install other programs.

If Win32:MdeClass has more time to run, the operating system may be damaged.
Besides, the Win32:MdeClass virus may use other malware (such asransomware) to infect your machine.
Some viruses are spread via the Internet connection.

Now, here is the tutorial.
Now, here is the tutorial.
Here, we use Avast as an example.

Thus, you’re able to take the following steps to run a virus scan.
After all steps are finished, the Win32:MdeClass virus should be removed.
And just reboot your box and check whether your box is still infected.

you gotta take some measures to safeguard your PC.
Antivirus software can identify and eliminate the threat before you were even aware of it.
Turn on Windows Defender Firewall
3.
Software updates are designed to withstand the latest security threats and fix some bugs.
So, you’d be smart to keep everything on your rig up to date.
Speaking of backing up data, there is a greatbackup software MiniTool ShadowMaker for you.
It is also a powerful tool to protect your Windows.
After all of the steps are finished, you have successfully backed up your files.
With MiniTool ShadowMaker, you might provide better protection for your setup and keep it safe.
From this post, you have known some information about Win32:MdeClass.