Hi Attilio, thanks for reaching out. My name is Bernard a Windows fan like you. I'll be happy to help you out today, I usually reply between 10:00 pm & 6:00 am EST(UTC -5) Monday to Sunday.
I understand the issue you have, there is nothing to worry I am here to help, the Antimalware service executable is part of Microsoft Security (Windows Defender) and it takes a lot of resources when it is scanning or there is a third-party service that may interrupt the process, in addition, it is not a virus, but there might be a virus that makes the Antimalware service executable goes high, in this case, we need to reconfigure the Windows defender by following the steps below:
Method 1. Repair Windows apps and Windows Defender:
On Powershell(admin), copy and paste the command below and hit enter:
Get-AppXPackage | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
restart the PC and check
Method 2. Reinstall Windows Defender
Open the registry, then go to
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender
Then delete the Windows Defender folder, restart the PC, and recheck it.
If none will work from the above solution, I suggest doing an in-place upgrade wherein it will upgrade the device to the latest version and repair all issues without deleting any files.
Note: before doing this make sure to create a restore point: https://support.microsoft.com/en-hk/help/402753...
- go to this link: https://www.microsoft.com/en-us/software-downlo...
- Select Download Now, and select Run. You need to be an administrator to run this tool.
- On the License terms page, if you accept the license terms, select Accept.
- On the What do you want to do? page, select Upgrade this PC now, and then select Next.
- After downloading and installing, it should fix the issue.
Reference: https://www.microsoft.com/en-us/software-downlo...
Let me know how it goes and I hope that helps.
Bernard