very frustrated with my $1,000 new touch screen computer due to windows 8. i download win8.1 from play store looking for a easier os so could enjoy my new computer. but i have a problem windows defender will not turn on!!!! i tried all community posted things and replies from microsoft. when i press start it gives this error message:[ERROR 577 windows can not digital verify signture for this file ]etc.... come on guys i never had problems win 98xp i loved useing my computer everyday. it was simple to understand and find the fix for the regular guy. now i HATE Using my NEW COMPUTER DUE TO WIN8 and WINDOWS 8.1 i thought would make things better. i wish i could put win98 or win7 on this computer so i can enjoy my purchase. anyone know how to get Win8.1 win defender to work??? or want to buy a $1,000 hp i7 with 2 tb 8 gb paper weight? <Moved from Windows>

http://answers.microsoft.com/en-us/protect/forum/protect_defender-protect_start/windows-defender-not-working-after-upgrade-to/51ff2e69-b7e7-46da-84c9-392bf040ef1e In the above thread we have seen that OP had same problem as yours and he tried some editing of registry that we normally do not recommend but it worked for him. You may want to give it a try. All you have to do is to: Press Win key + R. This will open Run. Type "regedit" and hit enter. Navigate to these keys: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender 4. Change value of 'DisableAntiSpyware' and 'DisableAntiVirus' from '0' to '1'. 5. After changing the values go to 'C:\Program Files\Windows Defender' and open 'MSASCui.exe' file. Hope this will fix the problem.

I also have the same problem after uninstalling Norton 360 (with official Norton Unistall Tool); could this be some devious legacy left by Norton? Has a solution been found since the last post above (Jan 26 2014). I have looked at the registry adjustments given above, but my registry does not show the same entries as stated above, so have not made any speculative changes - too dangerous when messing with the registry.

I am having this same problem. I have been trying solutions for two days now. Just tried the uninstall from Norton. Did the sfc/scannow. I keep trying all of the links. I keep hitting dead-ends. I am having the same problem. We buy new computers and within months, there are so many updates that cause problems I just wish Microsoft would get it right before releasing the updates. So they fix this error..if we cant fix it now..I sure hope they fix it and give us a new update that works to give loyal fans help. This is really getting frustrating and is ridiculous considering how long these programs have been around. I am not going into my registry to fix anything, I did that once and completely lost so many other things that it was cheaper for me to actually go and buy another computer than fix the one screwed up by an update. I will not be buying a new one if this one goes.. HELP US!!!!

error 577 when i attempt to turn on windows defender win8.1

Anonymous

very frustrated with my $1,000 new touch screen computer due to windows 8. i download win8.1 from play store looking for a easier os so could enjoy my new computer. but i have a problem windows defender will not turn on!!!! i tried all community posted things and replies from microsoft. when i press start it gives this error message:[ERROR 577 windows can not digital verify signture for this file ]etc.... come on guys i never had problems win 98xp i loved useing my computer everyday. it was simple to understand and find the fix for the regular guy. now i HATE Using my NEW COMPUTER DUE TO WIN8 and WINDOWS 8.1 i thought would make things better. i wish i could put win98 or win7 on this computer so i can enjoy my purchase. anyone know how to get Win8.1 win defender to work??? or want to buy a $1,000 hp i7 with 2 tb 8 gb paper weight?

<Moved from Windows>

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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Answer accepted by question author

Anonymous

http://answers.microsoft.com/en-us/protect/forum/protect_defender-protect_start/windows-defender-not-working-after-upgrade-to/51ff2e69-b7e7-46da-84c9-392bf040ef1e

In the above thread we have seen that OP had same problem as yours and he tried some editing of registry that we normally do not recommend but it worked for him. You may want to give it a try. All you have to do is to:

Press Win key + R. This will open Run.
Type "regedit" and hit enter.
Navigate to these keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender 4. Change value of 'DisableAntiSpyware' and 'DisableAntiVirus' from '0' to '1'. 5. After changing the values go to 'C:\Program Files\Windows Defender' and open 'MSASCui.exe' file.

Hope this will fix the problem.

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Answer accepted by question author

Anonymous

This error seems to be of Windows rather than of Windows Defender. Please post a question in Windows 8.1 forum, they can help better.

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Answer accepted by question author

Anonymous

I have seen some more cases like this and I think the problem is specific with Windows Defender only. I want you to try this:

Turn off Windows Defender by going to Settings --> Administrator and unchecking "Turn on this app" and clicking "Save Changes". After turning off Windows Defender, open Registry Editor (in Start menu search for regedit.exe and open it). After opening Registry Editor, navigate to this registry key:

KEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services and change values of 'Start' and 'Type' entries according to the following:

WdBoot -->

Start: 0

Type: 1

WdFilter -->

Start: 0

Type: 2

WdNisDrv -->

Start: 2

Type: 1

WdNisSvc -->

Start: 2

Type: 16

WinDefend -->

Start: 2

Type: 16

Example:

Note: Incorrect editing of registry can cause serious damage to system. And you are doing edits in very sensitive area of registry. So be very careful. If you didn't understand anything then stop and ask it. I will explain in simpler words.

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159 additional answers

Anonymous

2014-02-14T11:55:34+00:00

I also have the same problem after uninstalling Norton 360 (with official Norton Unistall Tool); could this be some devious legacy left by Norton? Has a solution been found since the last post above (Jan 26 2014).

I have looked at the registry adjustments given above, but my registry does not show the same entries as stated above, so have not made any speculative changes - too dangerous when messing with the registry.
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Anonymous

2014-01-26T19:29:32+00:00

I am having this same problem. I have been trying solutions for two days now. Just tried the uninstall from Norton. Did the sfc/scannow. I keep trying all of the links. I keep hitting dead-ends.

I am having the same problem. We buy new computers and within months, there are so many updates that cause problems I just wish Microsoft would get it right before releasing the updates. So they fix this error..if we cant fix it now..I sure hope they fix it and give us a new update that works to give loyal fans help.

This is really getting frustrating and is ridiculous considering how long these programs have been around. I am not going into my registry to fix anything, I did that once and completely lost so many other things that it was cheaper for me to actually go and buy another computer than fix the one screwed up by an update. I will not be buying a new one if this one goes..

HELP US!!!!
Was this answer helpful?

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