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Windows 7: Windows Defender 0x80070424 Error

06 May 2011   #21
Carolyn

Windows 7 Ultimate 64 bit
 
 

You're welcome.


My System SpecsSystem Spec
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04 Jun 2011   #22
phw8558

windows 7 home premium 64bit
 
 

I believe I have a fix for you if you haven't found one yet or reinstalled. I also had this same problem and was able to fix it fairly easy.
My System SpecsSystem Spec
06 Jun 2011   #23
Kbalanis

Windows 7 Professional 64-bit
 
 

Actually I haven't been able to get it fixed yet. I've been using Microsoft Security Essentials currently which works very well but I still would love to get my Defender fixed.
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06 Jun 2011   #24
phw8558

windows 7 home premium 64bit
 
 

Ok. First can you check if you have a windows defender service running by going to start, and search for services. Second check your registry for this key: H_KEY_LOCAL_MACHINE/System/CurrentControlSet/services/WinDefend. In the WinDefend folder there should be 3 subfolders labeled parameters, security and triggerinfo. Let me know if you have the windefend service running or these keys in your registry.
My System SpecsSystem Spec
07 Jun 2011   #25
Kbalanis

Windows 7 Professional 64-bit
 
 

First and foremost, there is no Windows Defender Service listen in my services.msc. In my registry, I have ControlSet001 AND ControlSet002. Both those folders have a WinDefend folder and both those WinDefend folders only have the "parameters" subfolder, that's it.
My System SpecsSystem Spec
07 Jun 2011   #26
phw8558

windows 7 home premium 64bit
 
 

You don't have a "CurrentControlSet" subfolder? It should be listed right below the two you named. If not try this anyhow just be sure to back up your registry before hand. After backing up merge this with your registry and reboot. Report any changes. windefend.reg


My System SpecsSystem Spec
08 Jun 2011   #27
Kbalanis

Windows 7 Professional 64-bit
 
 

Geez, yeah I have a CurrentControlSet folder, sorry. It only has the parameters subfolder, just like the other ones though. I'll try running that windefend file, after backing up the registry of course. I'll let you know if it works.

It worked! Thank you so much. I have MSE running right now so Defender is disabled but, right after I disabled MSE, I was able to open Defender. You're a life saver thanks!!
My System SpecsSystem Spec
08 Jun 2011   #28
phw8558

windows 7 home premium 64bit
 
 

Glad I could help! Thankfully you didn't have to format and go through all that hassel of reinstalling windows.

Apparently the malware can destroy some of the reg files. This also happened to my windows security center and I did a similar fix.
My System SpecsSystem Spec
05 Oct 2011   #29
phatwebs

Windows 7 Ultimate 64-bit
 
 

Quote   Quote: Originally Posted by phw8558 View Post
You don't have a "CurrentControlSet" subfolder? It should be listed right below the two you named. If not try this anyhow just be sure to back up your registry before hand. After backing up merge this with your registry and reboot. Report any changes. Attachment 158601
After a lot of searching, I finally found this thread with the fix. The .REG file that phw8558 posted worked. And I have no clue how my Windows Defender got into this state in the first place. Well, thank you!!!
My System SpecsSystem Spec
20 Jan 2012   #30
z752

Windows 7 64-bit
 
 

Thank you for this registry file! There's lots of advice online for this problem but none of it works. Finally found your file and it is fixed.

"Windows Defender specified service does not exist as an installed service. (Error Code: 0x80070424)"
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 Windows Defender 0x80070424 Error




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