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cannot delete key in regedit


tried to delete HKEY_CURRENT_USERSoftware360TotalSecurity
Thought I had removed 360 Total Security from pc running Win 10. But it still appears in Task Manager as a Background process. Keep receiving message error while deleting key.
My account set up as Administrator.

Sounds like there is still a service running. Keys are protected to prevent malware from tampering it.
For starters download and install it again, restart. Use Wise Program Uninstaller to launch a normal uninstaller.
After it finishes scanning and remove leftovers, restart. If it will be still running, you will have to do it the hard way.

HKEY_CURRENT_USERSoftware360TotalSecurity will only contain settings related to the software user interface, not with the software itself. These will be somewhere in HKEY_LOCAL_MACHINE. Security software must protect itself from malware so you need to follow proper uninstall procedures.

HKEY_CURRENT_USERSoftware360TotalSecurity will only contain settings related to the software user interface, not with the software itself. These will be somewhere in HKEY_LOCAL_MACHINE. Security software must protect itself from malware so you need to follow proper uninstall procedures.
I followed the 'proper uninstall procedures' and it's still running in the background. What do you recommend?

Sounds like there is still a service running. Keys are protected to prevent malware from tampering it.
For starters download and install it again, restart. Use Wise Program Uninstaller to launch a normal uninstaller.
After it finishes scanning and remove leftovers, restart. If it will be still running, you will have to do it the hard way.
Cannot reinstall. Keep getting error message. What's the hard way [for Win 10]?

Click on the running process and select Open File Location, so you will know, where to find the files.

It would probably best to do it a safe mode.

Safe Mode - Start Windows 10 in - Windows 10 blog

Once in safe mode, the service should not be started, so go to the file location and remove it.
If it does allow it, you will need to take ownership of it first and then remove it.

Take Ownership - Add to Context Menu in Windows 10 - Windows 10 blog

There will be some reg entries left, but without files, they will not run anything.
But you can still remove them, but you will need to take ownership of them as well.

how to take ownership permission of a registry key in windows 10 - YouTube

One key will be located in here under the name of the AV, something like 360 Antivirus.

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServices

You will need to take ownership of it and then remove it.

Click on the running process and select Open File Location, so you will know, where to find the files.

It would probably best to do it a safe mode.

Safe Mode - Start Windows 10 in - Windows 10 blog

Once in safe mode, the service should not be started, so go to the file location and remove it.
If it does allow it, you will need to take ownership of it first and then remove it.

Take Ownership - Add to Context Menu in Windows 10 - Windows 10 blog

There will be some reg entries left, but without files, they will not run anything.
But you can still remove them, but you will need to take ownership of them as well.

how to take ownership permission of a registry key in windows 10 - YouTube

One key will be located in here under the name of the AV, something like 360 Antivirus.

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServices

You will need to take ownership of it and then remove it.
This worked; many thanx

cannot delete key in regedit