Windows 10: Windows 10 Defender runs high CPU when logged in and doesn't stop until logged out.

I've never heard of this issue, so I can only tell you what's not true about this issue.


1. None of the non-Microsoft services is causing this issue. I know because I shut them all down.

2. Steps to repeat: 1 Login. Just one step.

3. Performed a full scan.

4. Cleared the schedule actually it was already cleared.

5. Excluded scanning itself both in their Program Files folder, ProgramData folder, and the process MsMpEng.exe

6. I ran the sfc /scannow.

7. I rolled back using the system restore. I thought it resolved, but the issue came back.

8. I upgraded to 20H2.

9. I upgraded all optionals.

10. I'm unable to adjust the affinity or priority because it's protecting itself.

11. I am Administrator.

12. Nobody on the internet mentioned this issue, although many have similar issues.

:)

 

Windows 10 doesn`t log in after update

Hi,

You may need to reset your password for you to access your account again. To assist you better, we'd like to gather more information:

• Which build and version of Windows 10 are you using?
• Are you trying to log in to your Microsoft Account or to your Windows 10 local account?
• Have you tried resetting your password?

Meanwhile, you're trying to log in to your Microsoft Account, we suggest that you follow the steps in this

forum article shared by PaulSey on how to reset your password and recover your Microsoft Account.

If you're trying to log in to your Windows 10 local account, we suggest that you perform the instructions in this

article on how you can reset your Windows 10 local account.

Keep us posted if you need additional help.

 

Windows Defender doesn´t load in Windows 10 startup and run slowwwwly

After updated the Windows 7 to 10 and error in avast (loaded very slowly Chrome. , f.ex.), i was uninstall the avast and used the Windows Defender (native of Windows) to protect against virus, malware and others bad things. But, the system runs more
quickly, and the Windows defender runs slooowwwwly; the rapld (quick) verification run slowly, 11.000 files in 9 hours (???????). Is correct? In Windows 7 the same process run quickly and the process take a 2 hours, maximum. Now, the windows defender´s icon
doesn´t show in taskbar, and i can´t ideia if the program is full loaded.

Thanks

Martin.

 

wpcmon.exe high CPU usage

Your remark about high IO got me thinking. I had a hunch that it could be caused by lack of permissions when trying to initialize some resource. So what I did:

• I changed the account type of my children to 'Administrator'
• I logged into their accounts --> the CPU usage of wpcmon.exe averaged around a reasonable 5%
• I logged out of their accounts again
• I changed their account types back to 'Standard User'
• Logging back into their accounts, I did not see high CPU usage anymore

I'll check again later to see if it's not a coincidence.

For completeness sake, while diagnosing I also:

• cleared all the event logs
• I tried running the 'FamilySafetyMonitor' task as Administrator (in Task Scheduler definition you can choose a user and set the password - see my previous post where to find it) but this caused the job to go into an infinite loop of starting & stopping.
• installed the latest updates for Windows 10.
• I logged on to familysafety.microsoft.com and merged my children's settings for that PC to the new Windows 10 definition.

So maybe one of those fixed it but I honestly doubt it.