Fixing the Windows Update Error Code 8024A00 it not that hard. There are two ways for doing it. I will start with the easiest and then go to the more advanced one.

Troubleshooter

The easy way to fix this is by letting Windows do the work for us. There is an automatic troubleshooter included with Windows so let’s try that one first.

1. Get to the Search bar (on your start menu or from the home screen.
2. Enter Troubleshooting, and if needed select the Settings tap.
3. Open the troubleshooting and under System and Security, tap or click Fix problems with Windows Update.

If this doesn’t work we will have to do some extra steps by hand.

Reset the Windows update components manually

Stopping services pertaining to Windows Update

1. Click Start , click All Programs , click Accessories , right-click Command Prompt , and select Run as Administrator .
2.  If you receive a notification from User Account Control simply click Continue .
3. At the command prompt, type the following, commands and then press ENTER after each command.
   net stop wuauserv
   net stop bits
   net stop cryptsvc
4. Please do not close the Command Prompt window.

Renaming folders pertaining to Windows Update

1. At the command prompt, type the following commands, and then press Enter after each command:
   ren %systemroot%\System32\Catroot2 Catroot2.old
   ren %systemroot%\SoftwareDistribution SoftwareDistribution.old
2. Please do not close the Command Prompt window.

Registering DLL’s pertaining to Windows Update

1. Please copy and paste the following text into a new Notepad document, and save the file as WindowsUpdate.BAT
2.  If saved correctly the icon will change from a Notepad file to BAT file which has two blue cogs as its icon.
   -or-
3. You can manually type each command at the command prompt:

regsvr32 c:\windows\system32\vbscript.dll /s
regsvr32 c:\windows\system32\mshtml.dll /s
regsvr32 c:\windows\system32\msjava.dll /s
regsvr32 c:\windows\system32\jscript.dll /s
regsvr32 c:\windows\system32\msxml.dll /s
regsvr32 c:\windows\system32\actxprxy.dll /s
regsvr32 c:\windows\system32\shdocvw.dll /s
regsvr32 wuapi.dll /s
regsvr32 wuaueng1.dll /s
regsvr32 wuaueng.dll /s
regsvr32 wucltui.dll /s
regsvr32 wups2.dll /s
regsvr32 wups.dll /s
regsvr32 wuweb.dll /s
regsvr32 Softpub.dll /s
regsvr32 Mssip32.dll /s
regsvr32 Initpki.dll /s
regsvr32 softpub.dll /s
regsvr32 wintrust.dll /s
regsvr32 initpki.dll /s
regsvr32 dssenh.dll /s
regsvr32 rsaenh.dll /s
regsvr32 gpkcsp.dll /s
regsvr32 sccbase.dll /s
regsvr32 slbcsp.dll /s
regsvr32 cryptdlg.dll /s
regsvr32 Urlmon.dll /s
regsvr32 Shdocvw.dll /s
regsvr32 Msjava.dll /s
regsvr32 Actxprxy.dll /s
regsvr32 Oleaut32.dll /s
regsvr32 Mshtml.dll /s
regsvr32 msxml.dll /s
regsvr32 msxml2.dll /s
regsvr32 msxml3.dll /s
regsvr32 Browseui.dll /s
regsvr32 shell32.dll /s
regsvr32 wuapi.dll /s
regsvr32 wuaueng.dll /s
regsvr32 wuaueng1.dll /s
regsvr32 wucltui.dll /s
regsvr32 wups.dll /s
regsvr32 wuweb.dll /s
regsvr32 jscript.dll /s
regsvr32 atl.dll /s
regsvr32 Mssip32.dll /s

Restarting services pertaining to Windows Update

1. Click Start , click All Programs , click Accessories , right-click Command Prompt , and select Run as Administrator .
2. If you receive a notification from User Account Control simply click Continue .
3. At the command prompt, type the following, commands and then press ENTER after each command.
   net start wuauserv
   net start bits
   net start cryptsvc
   exit
4. Now please check for updates using Windows Update to see if the issue has been resolved.