Windows defender is slowing down windows 10

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I have a brand new Dell Inspiron with Windows 10. When Defender is running my computer is extremely slow. It's so slow I have to wait literally seconds for the cursor to catch up with where I want it to be. I tried the System Maintenance "fix" and the program told me no fixes were required.

This is extremely frustrating. I turned Defender off but of course it turns itself back on. I tried to uninstall Defender but there's no option for that.

I want a fix for this ridiculous problem. I spent a lot of money for this computer. My family was pushing me to buy a Mac but I stayed loyal to Windows. Maybe that was a mistake.

I expect a fix for this. Give me a way to either turn Defender off permanently or uninstall it. 

Hi Robert,

Before you decide to permanently disable Windows Defender on your PC, we recommend that you check and try the workaround provided by JackTripper from this post.

Let us know how it went.

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Today I just noticed how "evil" you morons (Windows Defender team) are. I had to comment on the matter...

Background: If you're tech-savvy and/or work in the IT Security industry, you know for a fact that Windows Defender:

                    > doesn't and WILL NEVER have the same scores in AV Comparatives as the industry leading AV-products (this translates in the quality of Virus Definition Files, speed with which it detects/blocks malicious threats, etc.);

                    > looks like a pre-2000's product (the UI/UX is gruesome to say the least);

                    > but most importantly IT MANIPULATES the user's choice of an AV product, similar to how they did with Microsoft Edge (and I'm going to detail that bellow). 

First off, Windows Defender will always notify you that you are "NOT PROTECTED" while using another program as the default security solution (Antivirus), giving you in-app warnings that you're not protected, system push-notifications asking you to consider "PROTECTING" your system (although you might already have an up-to-date AV solution securing your system), displaying hyperlinks that take you to the uninstall apps section in Windows 10 to uninstall your current solution. 

OK so if all the above didn't DISGUST the living hell out of you already, then you'll LOOOOOVE what I'm about to tell you next!

One of my Windows 10 workstations (a powerful i7 processor machine) wasn't updated in a while, so like any security-savvy guy, I proceeded to update all my software, especially my AV solution (I'm using Avira and have never been disappointed). Then I realized the machine was really slowing down, I even started a system log collector instance to see what's going on. 

Long story short, it was Windows Defender that was clogging up all my RAM & CPU. After disabling all it's 4 (turned on by default options) through which it is sending data to the cloud, as well as logging locally info about your activity, the system returned back to normal. 

For the inexperienced user, it might have seemed that the Antivirus solution you had installed was doing the DAMAGE, but it was Microsoft's excuse for a security solution that was doing the dirty deeds.

@Microsoft, is this how you plan on making users switch to your security solution? Damn! 
#disgusted 

 

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We should all ditch Microsoft. Their programmers are some of the worst in the world. Their software is SO bloated with stupid code it's a wonder my computer runs at all. These jerks should have to PAY for all the lost productivity from the workforce. 

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Hi,

Since the computer is new and still under warranty please contact Dell Support and the seller. As OEM Dell is responsible for the proper operation of both the hardware and Windows. So regardless of the cause it is theirs to resolve. And the unit is under full warranty and may be in need of repairs or replacement. Added that even if you are able to resolve the issue you would want it fully documented just in case there are related problems down the road. Remember the more you do the more they will say it is something you have done.

Dell Support
http://support.dell.com/

Dell Drivers - Product Manuals & Warranty Info (left side) - Tech Support and more
http://support.dell.com/support/index.aspx?c=us&l=en&s=dhs

Dell Forums
http://en.community.dell.com/forums/

Dell PC Diagnostics
http://www.dell.com/support/Diagnostics/us/en/19/

========== 

If using an SSD or hybrid hard drive be sure it has the latest firmware.

Try the Clean Boot method to see if a startup program is involved - if so it is a
process of elimination :

Right Click the start button - Command Prompt (Admin) - at the prompt type in

MSCONFIG

and hit enter

How to perform a clean boot in Windows
https://support.microsoft.com/en-us/kb/929135

Other programs to help :

Autoruns - Free - See what programs are configured to startup automatically
when your system boots and you login. Autoruns also shows you the full list
of Registry and file locations where applications can configure auto-start settings.
http://technet.microsoft.com/en-us/sysinternals/bb963902.aspx

Process Explorer - Free - Find out what files, registry keys and other objects
processes have open, which DLLs they have loaded, and more. This uniquely
powerful utility will even show you who owns each process.
http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx
==================================================

Do all of these :

If you had a 3rd party antivirus on the OS you upgraded OR if you have one
now uninstall it and then run its maker's removal tool. Use Windows Defender
which in Windows 8/8.1/10 is a full antivirus. Despite all the hype out there
Windows Defender and the Windows Firewall are true superstars.

List of anti-malware program cleanup/uninstall tools
http://answers.microsoft.com/en-us/protect/wiki/mse-protect_start/list-of-anti-malware-product-removal-tools/2bcb53f7-7ab4-4ef9-ab3a-6aebfa322f75

Uninstallers (removal tools) for common antivirus software
http://kb.eset.com/esetkb/index?page=content&id=SOLN146 

===============================

Check this :

Right Click Start button - Control Panel - Troubleshooting - on right side click View all -
System Maintenance.

-----------------------------------------------------

Tips to improve PC performance in Windows 10 <-- read this link
https://support.microsoft.com/en-us/help/4002019/windows-10-improve-pc-performance

The below is additional help with some of the methods in the "Tips to improve...." link.
Windows Key + X - Command Prompt (Admin)

SFC /scannow

Note if that shows uncorrected errors - do the below regardless.

When that completes run these :

DISM /online /cleanup-image /scanhealth

DISM /online /cleanup-image /restorehealth

Note if that shows any uncorrected errors - do the below regardless.

Then restart the computer.

Be sure you are running the latest available BIOS and drivers.

Check with System Maker (Motherboard Maker for custom systems) for updates
to the BIOS, low level chipset drivers, and the major on-board and separate 
device 
drivers. Run DriverView - set VIEW to Hide Microsoft drivers - update
those without Dump in their name.

DriverView - Free - utility displays the list of all device drivers currently loaded
on your system. For each driver in the list, additional useful information is
displayed: load address of the driver, description, version, product name,
company that created the driver, and more.
http://www.nirsoft.net/utils/driverview.html

For Drivers check System Maker as fallbacks and Device Maker's which are the
most current. Control Panel - Device Manager - Display Adapter - write down
the make and complete model of your video adapter - double click - Driver's
tab - write down the version info. Now click UPdate Driver (this may not do
anything as MS is far behind certifying drivers) - then Right Click - Uninstall -
REBOOT this will refresh the driver stack.

Repeat that for Network - Network Card (NIC), Wifi, Sound, Mouse and Keyboard
if 3rd party with their own software and drivers and any other major device drivers
you have.

Now go to System Maker's site (Dell, HP, Toshiba as examples) (as rollback) and
then Device Maker's site (Realtek, Intel, Nvidia, ATI as examples) and get their
latest versions. (Look for BIOS, Chipset, and software updates at System Maker's
site while there.)

Download - SAVE - go to where you put them - Right Click - RUN AD ADMIN -
REBOOT after each installation.

Always check in Device Manager - Drivers tab to be sure the version you are
installing actually shows up. This is because some drivers rollback before the
latest is installed (sound drivers particularly do this) so install a driver - reboot
- check to be sure it is installed and repeat as needed.

Repeat at Device Makers - BTW at Device Makers DO NOT RUN THEIR SCANNER -
heck manually by model.

Manually look at manufacturer's sites for drivers - and Device Maker's sites.
http://pcsupport.about.com/od/driverssupport/ht/driverdlmfgr.htm 


Hope this helps.
--------------------------------------------------------------------------------------------
Rob Brown - Microsoft MVP <- profile - Windows and Devices for IT : Bicycle - Mark Twain said it right.

Rob Brown - Microsoft MVP - Windows Insider MVP 2016 - current
Microsoft MVP Windows and Devices for IT 2009 - 2020

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Question Info


Last updated December 2, 2020 Views 46,556 Applies to: