Unable to turn on Windows Defender after McAfee Uninstall

I have windows 8 x64 that came preloaded with trial McAfee. Uninstalled after trial and security screens inform Defender turned off. Selecting to turn off does not configure the change. What is easiest way to fix issue and "move on" ?

Since, you're the one, who seems to know your way around windows, I would have a question, I have enabled windows defender, but it fails to update the virus definition, and the mentioned values are also stuck at 0, if I try to change them to 1, an error
message pops up saying it is unable to modify the value, I would be very happy with any help. I had Mcaffee preinstalled on my computer which I have removed...

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Thinkpad Yoga - Cant turn on Windows Defender

Just got my thinkpad today in the mail. I went about uninstalling the included Norton antivirus trial with the intention of turning on windows defender. I uninstalled Norton in the control panel and then used Norton's removal tool just to make sure.
When I tried to turn windows defender on in action center nothing happened. No messages or pop ups or anything. After some googling I was able to edit a defender registry file to let me turn it on. When I try to turn it on now the following happens:
Link to picture
How can I turn on defender?
Moderator note; picture(s) converted to link(s) About Posting Pictures In The Forums

Did you check if the Defender service is Started and set to Automatic? Here is a similar thread from Microsoft Forums that you can refer:
http://social.technet.microsoft.com/Forums/windows/en-US/642a5e21-2d7f-4122-b26e-811cfe54a89d/window...
Thanks!
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BT Netprotect vs Windows Defender vs McAfee

I have BT Netprotect - do I need to run Windows Defender, or do they do the same thing? Is there a potential for clashes between the two.
Windows Defender updates (KB915597) appears to have been crashing my computer, producing blue screens of death. Could this be due to clashes with BT Netprotect, or can I turn off Defender?
I'm running Windows Vista Home Premium, SP2
Additionally, McAfee does a periodic scan and tells me I am not protected against viruses. I thought Netprotect WAS McAfee!

Yes you can turn off Windows Defender but before you do read on and yes Netprotect is McAfee.
Here is a link showing how to turn Defender off.
http://windows.microsoft.com/en-gb/windows-vista/turn-windows-defender-on-or-off
Did you have McAfee on your computer before you installed Netprotect. If so this could be causing a conflict.
BtNetprotect Plus / McAfee can cause problems on some computers. Just do a “Netprotect or McAfee search on this forum. It also uses a lot of resources. The general advice is to uninstall BTNetprotect / McAfee and install another antivirus such as Microsoft Security Essentials, AVG Free 2013 or Avast free. Microsoft Security Essentials will work well on your computer and will integrate with Windows Defender
To uninstall follow this guide. Make sure that you also run the McAfee removal tool after you have restarted.
http://bt.custhelp.com/app/answers/detail/a_id/13523/~/i-don't-want-bt-netprotect-plus-anymore.-how-...
If you want to keep BtNetprotect / McAfee then an uninstall and reinstall usually sorts it out, at least for a short time. To do that carry out the uninstall / reinstall as per this link.
http://bt.custhelp.com/app/answers/detail/a_id/38369/~/how-to-remove-then-reinstall-bt-netprotect-pl...

Can't enable Windows Defender - used McAfee removal tool - Y580

I can't enable Windows Defender. I get the message "Windows Defender has been turned off and isn't monitoring your computer." So I used the McAfee removal tool, then rebooted my PC, but I still can't enable it.
Perhaps my laptop came with security software other than McAfee and I just don't remember uninstalling it? Does anyone know if an Ideapad Y580 comes with software other than McAfee? Or has any idea how I can enable Windows Defender?
TIA

cmkurup wrote:
I keep getting a message to use the action center where the link to enable defender is disabled. Please help.
Hi cmkurup,
I am unsure from your description exactly which setting for WD is disabled in the Action Center.
Perhaps some screenshots will help me explain what I think the problem may be.Scroll down to Option 2 here: http://www.eightforums.com/tutorials/21962-windows-defender-turn-off-windows-8-a.html
Review your settings, and see if that tutorial helps.
===============
Oops, we posted at the same time. Glad you fixed your problem. I'll leave my info here for anyone else who needs it.
ThinkPad: T530 / X1 Gen 2 / Helix - Yoga: Tablet 2 Pro (Win) / Yoga 3 Pro
If you find a post helpful and it answers your question, please click the "Accept As Solution" button.
Lenovo Advocate ~ I am not employed by Lenovo or Microsoft. I am a volunteer.
Microsoft MVP - Consumer Security
SpywareHammer

Unable to Turn on Home Sharing after iTunes upgrade

After the latest iTunes upgrade onYosemite, I get an 'Unable to Turn on Home Sharing' error on my 2 Apple TVs plus iPhone and iPad. Previously, I had no problem. I have restarted and reset my iTune on my MacBook plus all the devices now receiving an error message and the inability to utilize Home Sharing.
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Hi MomjiDoll!
I have an article for you that will help you troubleshoot your ability to use the Home Sharing feature:
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http://support.apple.com/kb/ts2972
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Relatively self explanatory. When I go into Privacy settings I am unable to turn Location Servies on. The option appears, but I cannot slide the switch to 'on'. This has only happened after the ios7 update.

Hi dombew,
Welcome to the Support Communities!
To address this issue, I would suggest restarting and/or resetting the iPhone:
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Unable to turn on windows process activation service thus IIS (CBS files uploaded in sky drive)

Hi,
I am trying to turn on/install IIS for local host and for that it require WAS to be installed and running. When try to turn on the feature of WAS i get the error "Error Occured. Not all the features were successfully changed." I had applied all
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Warm Regards,
Kuldeep
John

Hi,
There are two tools that can be used to fix this issue quickly:
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MSConfig.exe
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http://www.iis.net/learn/troubleshoot/installation-issues/troubleshooting-iis-7x-installation-issues
Meanwhile, you’d better post the OneDrive link where you post the CBS file.
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Wade Liu

Unable to re-install Windows 7 after changing to Raid 5 array

I have a 790FX-GD70 MoBo with a AMD PhenomII Deneb 965 Black CPU, 8gb G.skills DD3 1600 in 4x2gb array. I originally loaded Windows 7 witn a 1.5TB Seagate Barracuda HD without any problems. Everything worked fine,Duh. Then I decided to get more speed and stabilty for processing, I wanted to go to a Raid 5 or 10 array. I added 3 more Segate Barracuda HD 1.5T ST31500341AS to the original (same type drive). I copied all of the drivers from the MSI website onto a USB 4gb drive and downloaded all of the info in Appendix C. I assigned all for drives to the array with the intent to reload the Windows 7 OS after. The "problem" is that I can get all of the way in the Windows installation until the Re-boot and I get the message "The Installation was Canceled" and then a further message stating " Windows could not prepare the computer to Boot into the next phase of the installation. To install windows, restart the installation". Of course I have tried to reinstall and continue to get the same message. Can anyone suggest a fix? By the way it seems to think my portable drive is the C: drive? I would really appreciate any help!

Try also with a single stick of memory. - Sounds like a memory configuration we often warn people about.

Cannot reinstall Premier 6.0 on Windows 7 after an uninstall.

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My Windows defender is being turned off. How can I prevent this, & turn it back on?

This question was solved.
View Solution.

Hi,
I use ESET Endpoint Security and it's normal for this software to turn off Windows Defender to avoid potential conflicts that can occur if 2 security applications are running on the same PC.
Regards,
DP-K
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Microsoft MVP - Windows Experience

Error Message 0x80073afc trying to open Windows Defender

I was working on my mother's computer and somehow Windows Defender got turned off. There is spyware all over the computer, on every website popups, ads, highlighted words that lead to websites. I tried turning on Windows Defender, but I get this
message: "An error has occurred in the program during initialization. If this problem continues, please contact your system administrator." Error Code: 0x80073afc
I would like to know how to get Windows Defender to work properly and to rid my mother's computer of all of this. I tried system restore and it only goes back a couple of weeks. I did Microsoft Safety Scanner, and it removed at least 2 viruses.

Hi McWeid,
According to your description ,it seems that the machine has been injected by virus .
I suggest to run the Microsoft Safety Scanner in safe mode .
To get into safe mode ,restart the machine and keep pressing "Shift",troubleshoot ,advanced ,startup settings ,then restart to choose safe mode with network.
Then we can run "dism /online /cleanup-image /restorehealth" or "sfc /scannow"to check the health of the whole system files .
Best regards
Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact [email protected]

Cannot turn on my iBook after installing airport extreme card

I have an older iBook that's running OSX 10.4.3 I am trying to install an airport extreme card, but I am unable to turn the computer on after installing it. What's the deal?

you have an ibook G3?? if so, then you need the old "Airport Card", which apple no longer makes and you'll have to get from macmall or macwireless.com
iBook G4 Mac OS X (10.4.2)

Cannot activate Windows Defender imbedded in computer at purchase

I have just purchased a Toshiba Satellite Laptop. It comes with Windows Defender but is IN-ACTIVATED at time of purchase. I have tried to activate it and also gone on line for guidance and the steps advised do not work.
I am wondering if the McAffee Anti-virus software is blocking it????
Can anyone explain to me how to activate the Windows Defender in my laptop?
Solved!
Go to Solution.

It is turned off because of mcaffee, if you turn off mcaffee you will be able to turn on windows defender.
See this thread for some explanations:
http://answers.microsoft.com/en-us/protect/forum/protect_defender-protect_start/i-cant-turn-on-windo...
S70-ABT2N22 Windows 7 Pro & 8.1Pro, C55-A5180 Windows 8.1****Click on White “Kudos” STAR to say thanks!****

My laptop become blue screen after windows logo, after i update the graphic ati and intel driver

I have constant blue screen after windows logo and i have updated all drivers. i was upset the blue screen didn't go away and i did the factory reset. For my suprise, it didn't solve the problem and then i repair it at the comp shop. it was installed with windows 7 home premium 64 (pavilion g4 1006tx) bit as the pre installed windows and activated with the key back on sticker. I updated all drivers and i noticed every time i update the ati and intel driver it will go blue screen after windows logo. after i uninstall it at in safe mode it can load normally. My question is there any solution for my graphic card or is it already damaged? or any other hardware problem? please because i have to use high graphic as i use photoshop

hii
make sure you download and update correct driver version of graphic
and know spec
more:
http://support.hp.com/us-en/drivers/selfservice/HP-Pavilion-g4-Notebook-PC-series/5046252/model/5068...
try to instal "AMD High-Definition Graphics Driver" only
and uninstal "Intel High-Definition (HD) Graphics Driver"
Wisnu Suryandi

Windows 8.1 store apps aren't running after definition update of windows defender!!!

I am currently running windows 8.1 pro with media centre. 15 days back I installed this update
"Definition Update for Windows Defender - KB2267602 (Definition 1.189.752.0)"
after which my all windows apps(precisely metro apps/windows store apps) stoped working. Whenever I open such apps they dont get open. Sadly this update not uninstallable. I restored my system to the previous date. and all the apps started working
again. But now yesterday my windows updated again & now again I am in the same situation and this time I am unable to restore my windows as there is not restore point left. :/
Can any body help me out with this? I have scanned my Pc with Kapsersky2014, no viruses are found on system.

Hi,
Before returning the system to a previous restore point, we can first do some troubleshooting and see whether it KB2267602 that case this issue.
First, I suggest you run wsreset.exe to clear the Windows Store cache, most issues are caused by the cache, then you can also chec other solutions in the link below:
http://blogs.technet.com/b/askperf/archive/2013/10/11/what-to-do-if-your-windows-8-modern-app-fails-to-start.aspx
http://blogs.technet.com/b/ouc1too/archive/2013/10/19/windows-app-store-doesn-t-load-after-8-1-upgrade.aspx
Please post back if issue persist.
Yolanda Zhu
TechNet Community Support

Unable to turn on Windows Defender after McAfee Uninstall

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