It seems once TM gets loaded, then Defender turns off, but the problem is that the Defender service keeps it from loading until after it seems to be done. We also use TrendMicro AV for SMB (OfficeScan 11). This service seems to scan EVERYTHING while it is loading and some systems can take anywhere from 15-60 minutes to boot ( depending on what it is loading and what resources it has available to it) I can usually manage to get Task Manager open immediately after logging in to a computer so I can see what resources are being hogged, and Antimalware service/Defender is always running in the top 90-100% of resource use at startup.
This happens whether you have Defender disabled in the settings or not. Microsoft seems to have enabled Defender as a pre-scan detection method during a cold boot, to try and keep viruses at bay before your system is completely loaded and running. This past weekend, I think I figured out the problem (or at least part of it) while setting up a new system for a new employee. I have seen a number of complaint threads similar to this on the MS forums, but there has been no real "fix" so far, that I can see, so I'm coming to the group here to see if you can help - because you usually do when MS fails. If it is just hibernating or asleep, it is not too bad. Version 1607 Build 14393.1198Įver since Microsoft (and honestly, some other developers) sent out their "knee-jerk" updates to combat the past WannaCry outbreak, our systems have been uber slow when cold starting. If you've uninstalled an antivirus, you might need to reboot and or try the steps again.We are running Windows 10 Pro in our office. If that fails, check Windows Security > Virus & threat protection > Manage settings > Real-time protection is toggled on. If not, double-click DisableAntiSpyware and change the Value Data to 0 and click OK. The new key should have a Value Data of 0.
Name this new key DisableAntiSpyware and press Enter to save. If you don't see DisableAntiSpyware, right-click on the right window and click New > Dword (32-bit Value). Look for a registry key in the right window that's called DisableAntiSpyware. Type Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender into the search bar. Press the Windows Key + R, type in regedit and press Enter. Update - For those coming here about April 2020 problem, Microsoft has fixed the problem. Another common reason is when malware or a virus disabled your antivirus. These Windows Defender errors frequently appear after uninstalling another antivirus and allowing Windows Defender to take over as your primary antivirus. TIP: Hard to fix Windows Problems? Repair/Restore Missing Windows OS Files Damaged by Malware with a few clicks
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