Applies To:
Yarn princess
Had this question 10
Question
Yarn princess asked on

error code 0X80070645. when installing security essentials

Original title: error code 0X80070

When upgrading Security Essentials, I kept getting error code 0X80070645.  I uninstalled Sec. Essentials.  When tyring to reinstall same, I am getting the same error code.  In simple words, how do I get around this problem and get Sec. Essentials installed?  From what I can gather this problem has been around for awhile.  I dont understand why Microsoft does not have a straightforward fix on their site.

ronnbenji
Found this helpful 2
Answer
ronnbenji replied on

It took a lot of effort on my part to get this problem resolved. I had been in touch with live people at the help site, but it did no good. I ran the;
"Fix it for me", and it did no good. I finally found the answer by deleting:

Navigate to the below registry locations:

HKEY_CLASSES_ROOT > Installer > UpgradeCodes > 1F69ACF0D1CF2B7418F292F0E05EC20B

---Right click on1F69ACF0D1CF2B7418F292F0E05EC20B and delete the key


Which I found:

http://social.answers.microsoft.com/Forums/en-US/msestart/thread/07b750da-341a-44b6-887f-39c9c11353ed

Now everything works great. Thank you; ALL, for all the great information and help.
GuillaumeGabard
Found this helpful 7
Most Helpful Reply
GuillaumeGabard replied on

For Seven :

Remove registry key :

HKEY_CLASSES_ROOT > Installer > UpgradeCodes >26D13F39948E1D546B0106B5539504D9

For Windows XP :

HKEY_CLASSES_ROOT > Installer > UpgradeCodes > 1F69ACF0D1CF2B7418F292F0E05EC20B

And Install it !

Diana D
Found this helpful 1
Diana D replied on
Support Engineer

Hi,

Step 1: Run the FIX it in the article to remove Microsoft security essential completely. Then try reinstalling it.http://support.microsoft.com/kb/2435760

You can refer to  http://www.microsoft.com/security_essentials/HelpTopic.aspx?mkt=en-gb&assetid=cf5220bd-3da8-4694-ac42-f5396ef5ff0b

 

Check this out: http://social.answers.microsoft.com/Forums/en-US/msestart/thread/07b750da-341a-44b6-887f-39c9c11353ed

Diana

Microsoft Answers Support Engineer

Visit our  Microsoft Answers Feedback Forum and let us know what you think.

If this post helps to resolve your issue, please click the "Mark as Answer" or "Helpful" button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster.
Stephen Boots
Found this helpful 1
Stephen Boots replied on
MVP Community Moderator Community Star

 

If that fails to resolve the problem, open an email support case:

 

To open an email support case, start here:

https://support.microsoftsecurityessentials.com/

 

-steve

~ Microsoft MVP Windows Live ~ Windows Live OneCare| Live Mesh|MS Security Essentials Forums Moderator ~
Microsoft MVP
chrish16
Found this helpful 0
chrish16 replied on
Hey guys

I'e been on hours trying to fix this after i accidently removed the installer with Your Uninstaller as it wasn't labelled Security Essentials.

I've tried all the steps, the fixit, removing registry keys, but the one thing that has seemed to work is to install it from Microsof update.

Regards
ronnbenji
Found this helpful 2
Answer
ronnbenji replied on

It took a lot of effort on my part to get this problem resolved. I had been in touch with live people at the help site, but it did no good. I ran the;
"Fix it for me", and it did no good. I finally found the answer by deleting:

Navigate to the below registry locations:

HKEY_CLASSES_ROOT > Installer > UpgradeCodes > 1F69ACF0D1CF2B7418F292F0E05EC20B

---Right click on1F69ACF0D1CF2B7418F292F0E05EC20B and delete the key


Which I found:

http://social.answers.microsoft.com/Forums/en-US/msestart/thread/07b750da-341a-44b6-887f-39c9c11353ed

Now everything works great. Thank you; ALL, for all the great information and help.
Kent Dolezal
Found this helpful 0
Kent Dolezal replied on

Worked great!!!  Just deleted 1F69ACF0D1CF2B7418F292F0E05EC20B and then got Microsoft security essential to install completely!  Been trying for a week now to get it installed, Thanks.
GuillaumeGabard
Found this helpful 7
GuillaumeGabard replied on

For Seven :

Remove registry key :

HKEY_CLASSES_ROOT > Installer > UpgradeCodes >26D13F39948E1D546B0106B5539504D9

For Windows XP :

HKEY_CLASSES_ROOT > Installer > UpgradeCodes > 1F69ACF0D1CF2B7418F292F0E05EC20B

And Install it !

101Canuck101
Found this helpful 0
101Canuck101 replied on

For Seven :

Remove registry key :

HKEY_CLASSES_ROOT > Installer > UpgradeCodes >26D13F39948E1D546B0106B5539504D9

For Windows XP :

HKEY_CLASSES_ROOT > Installer > UpgradeCodes > 1F69ACF0D1CF2B7418F292F0E05EC20B

And Install it !

This is the most helpful post on the site

I found 
for Windows 7

For Seven :

Remove registry key :

HKEY_CLASSES_ROOT > Installer > UpgradeCodes >26D13F39948E1D546B0106B5539504D9


This resolved my issue!