Let's see if getting rid of any/all Norton and/or McAfee "leftovers" makes any difference. Roll up your sleeves & cross your fingers...
ACTIONS
[You will want to print these instructions for offline reference. IMPORTANT => DON'T SKIP ANY STEP & perform all Steps in one, uninterrupted session! If a Step says to reboot,reboot!]
1a. Right-click on the following link, select SAVE TARGET AS... & download the McAfee Consumer Products Removal Tool, saving it to your desktop:
http://us.mcafee.com/apps/supporttools/mcpr/mcpr.asp
1b. Right-click on the following link, select SAVE TARGET AS... & download the Norton Removal Tool, saving it to your desktop:
ftp://ftp.symantec.com/public/english\_us\_canada/removal\_tools/Norton\_Removal\_Tool.exe
- Close all open applications (i.e., anything with an icon on the taskbar).
3a. Right-click on the file you saved in Step #1a above and select Run as Administrator to run the McAfee utility. Don't TOUCH your keyboard until the run completes, then reboot.
3b. Right-click on the file you saved in Step #1b above and select Run as Administrator to run the Norton utility. Don't TOUCH your keyboard until the run completes, then reboot again.
4a. Right-click on the following link & save the download to your desktop: **ie8-rereg.all.zip** [1]
4b. Right-click on the file you saved in #4a & select EXTRACT ALL. This will create a new desktop folder also named
ie8-rereg.all. The folder will contain both of the scripts below (plus a third one that you will NOT use).
Note => The scripts are good for IE9, IE10 & IE11, too.
5a. Close all open applications (i.e., anything with an icon on the taskbar), open the folder created in Step #4b above & double-click on the file named
ie8-rereg.32on64.cmd to run the script.
5b. Repeat for the file named ie8-rereg.64on64.cmd then reboot.
- Re-assert Internet Explorer as the default Browser in the CUSTOM (<=important!) section of Set
Program Access and Computer Defaults. [2]
- Reset Internet Explorer per the instructions on this page => http://windows.microsoft.com/en-us/internet-explorer/reset-ie-settings
Note=> For optimal results, check the Delete personal settings option.
8a. Open Internet Explorer (only!) to http://windows.microsoft.com/en-us/windows-vista/windows-update-error-8000ffff [ignore the title & references to Vista].
8b. Ignoring any "Not recommended" or similar warnings, run Fix It (#50202) in DEFAULT
and then AGGRESSIVE modes. [3]
- Reboot one last time then test by running a manual check for updates and seeing if the upgrade to Win10 succeeds now.
• HOW TO run a manual check for updates
https://support.microsoft.com/en-us/kb/3067639
- Reply to this post with a status report.
Good luck!
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[1] Trusted Source: my colleague IE MVP Kai Schätzl's page http://iefaq.info/index.php?action=artikel&cat=42&id=133&artlang=en
[2] After we've finished this thread, feel free to reassert Firefox as your default, if you wish.
[3] Full Disclosure: Running the Fix It in AGGRESSIVE mode will delete your Update History but not the list of Installed Updates.