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Windows 7: cant start defender cant install MSE error code:0x8004FF91

17 Nov 2014   #1
FOXEN

Windows 7 Home Premium (64-bit)
 
 
cant start defender cant install MSE error code:0x8004FF91

hi i used a tool to remove Norton - have tried everything

cant start Defender and cant install MSE

looking for a specific fix to my issue

lap top is Sony VAIO E series


My System SpecsSystem Spec
.
17 Nov 2014   #2
cottonball

Windows 7 Home Premium
 
 

FOXEN,

Let me see if I understand the issues...

You removed what, Norton AV?

As a result, now, Windows Defender does not start?

After removing Norton AV, you also are not able to install MSE?



One at a time..on Windows Defender:

1. Have you run services.msc, opened Services Manager, and see if the Windows Defenderservice is started and set to Automatic?

2. Did you check the Windows Management Instrumentation (WMI) repository?
It allows management information to be shared between management applications.

Restarting the WMI repository may help:

Open a Command Prompt (Start > All Programs >Accessories > Command Prompt), right-click, and select: Run as Administrator

Copy/paste the following (with the mouse) at the prompt, and press Enter:

winmgmt /verifyrepository

If you get a message “WMI repository is not consistent”, enter the following command at the prompt:

winmgmt /salvagerepository

This action performs a consistency check on the WMI repository.

Restart the computer and try enabling Windows Defender.

If you get the following message:

winmgmt /salvagerepository failed

Ignore the message, and once again run the following at the command prompt:

winmgmt /salvagerepository


Try Windows Defender again.
My System SpecsSystem Spec
17 Nov 2014   #3
FOXEN

Windows 7 Home Premium (64-bit)
 
 

Hi thanks,

I let Norton 360 expire

I tried to start Windows Defender through services.msc as administrator and couldn't, it timed out and gave an error

I uninstalled N360

Tried to start Defender again without success

I used a tool to remove Norton / Symantec from my computer

Defender still wouldn't start

Realised MSE is what I wanted

Downloaded MSE but it wouldn't install and gave the error code above

I verified the repository at the command prompt as "consistent"
My System SpecsSystem Spec
.

18 Nov 2014   #4
Jacee
Microsoft MVP

Windows 7 Ultimate 32bit SP1
 
 

  1. Please download MGADiag[/url] and save it to your desktop.
  2. Double click the icon on your desktop.
  3. Push
  4. Push
  5. Go to Start -> Run and type in "Notepad"
  6. Go to Edit -> Paste in notepad.
  7. x out all of the numbers and letters in the line beginning with "Windows Product Key:"
  8. Copy and paste that log here.
My System SpecsSystem Spec
18 Nov 2014   #5
cottonball

Windows 7 Home Premium
 
 

Thanks for the info, FOXEN.

On: MSE error code:0x8004FF91 - it leads to believe that there are still remnants of your previous AV in the system. Somewhere in the computer, more than likely, there is a Registry key preventing the installation of MSE. This may occur when other security software is not fully removed.

Did you use the Norton Removal Tool to uninstall your Norton product?
https://support.norton.com/sp/en/us/...=1&pvid=f-home

BTW, does Windows Update work?
My System SpecsSystem Spec
18 Nov 2014   #6
FOXEN

Windows 7 Home Premium (64-bit)
 
 

Quote   Quote: Originally Posted by cottonball View Post
Thanks for the info, FOXEN.

On: MSE error code:0x8004FF91 - it leads to believe that there are still remnants of your previous AV in the system. Somewhere in the computer, more than likely, there is a Registry key preventing the installation of MSE. This may occur when other security software is not fully removed.

Did you use the Norton Removal Tool to uninstall your Norton product?
https://support.norton.com/sp/en/us/...=1&pvid=f-home

BTW, does Windows Update work?
Hi - yes i used that tool and it says update is working
My System SpecsSystem Spec
18 Nov 2014   #7
FOXEN

Windows 7 Home Premium (64-bit)
 
 

Quote   Quote: Originally Posted by Jacee View Post
  1. Please download MGADiag[/url] and save it to your desktop.
  2. Double click the icon on your desktop.
  3. Push
  4. Push
  5. Go to Start -> Run and type in "Notepad"
  6. Go to Edit -> Paste in notepad.
  7. x out all of the numbers and letters in the line beginning with "Windows Product Key:"
  8. Copy and paste that log here.
Hi thanks - the URL icon when downloaded onto my desktop had the chrome icon, does that matter?

Do i press the "continue" button in the newly opened page or in your original message?

I can't seem to produce any log that I can copy paste into a notepad??

And also Microsoft Support verified online that my windows copy is genuine and couldn't resolve the pop up issue that looks exactly like your MGA icon.
My System SpecsSystem Spec
19 Nov 2014   #8
FOXEN

Windows 7 Home Premium (64-bit)
 
 

bump??
My System SpecsSystem Spec
19 Nov 2014   #9
cottonball

Windows 7 Home Premium
 
 

Please do the following...

Download Security Check:
http://screen317.spywareinfoforum.org/
Save to your Desktop.
Double-click: SecurityCheck.exe
Follow the onscreen instructions inside the black box.

When done, a Notepad report opens automatically, called: checkup.txt

Without taking any corrective actions, please post the checkup.txt in your reply.
My System SpecsSystem Spec
19 Nov 2014   #10
FOXEN

Windows 7 Home Premium (64-bit)
 
 

Quote   Quote: Originally Posted by cottonball View Post
Please do the following...

Download Security Check:
http://screen317.spywareinfoforum.org/
Save to your Desktop.
Double-click: SecurityCheck.exe
Follow the onscreen instructions inside the black box.

When done, a Notepad report opens automatically, called: checkup.txt

Without taking any corrective actions, please post the checkup.txt in your reply.
Results of screen317's Security Check version 0.99.90
Windows 7 Service Pack 1 x64 (UAC is enabled)
Internet Explorer 10 Out of date!
``````````````Antivirus/Firewall Check:``````````````
Windows Firewall Enabled!
WMI entry may not exist for antivirus; attempting automatic update.
`````````Anti-malware/Other Utilities Check:`````````
Java(TM) 6 Update 16
Java 7 Update 71
Adobe Flash Player 15.0.0.223
Adobe Reader XI
Google Chrome 37.0.2062.124 Google Chrome out of date!
````````Process Check: objlist.exe by Laurent````````
Microsoft Small Business Business Contact Manager BcmSqlStartupSvc.exe
`````````````````System Health check`````````````````
Total Fragmentation on Drive C: 2%
````````````````````End of Log``````````````````````
My System SpecsSystem Spec
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 cant start defender cant install MSE error code:0x8004FF91




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