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.

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:

Now everything works great. Thank you; ALL, for all the great information and help.

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Question Info

Last updated August 29, 2019 Views 8,264 Applies to: