Error 8024A000 - Windows Update

Windows Updates Error Code 8024A000 solution below: -
Troubleshooting steps by steps for Windows updates error code 8024A000

Stopping services pertaining to Windows Update

Click Start, click All Programs, click Accessories, right-click Command Prompt, and select Run as Administrator.

If you receive a notification from User Account Control simply click Continue.
At the command prompt, type the following, commands and then press ENTER after each command.

net stop wuauserv
net stop bits
net stop cryptsvc

Please do not close the Command Prompt window.

Renaming folders pertaining to Windows Update

At the command prompt, type the following commands, and then press Enter after each command:

ren %systemroot%System32Catroot2 Catroot2.old
ren %systemroot%SoftwareDistribution SoftwareDistribution.old

Please do not close the Command Prompt window.

Now run batch file from here or create manually batch or run manually all the below commands.

regsvr32 c:windowssystem32vbscript.dll /s
regsvr32 c:windowssystem32mshtml.dll /s
regsvr32 c:windowssystem32msjava.dll /s
regsvr32 c:windowssystem32jscript.dll /s
regsvr32 c:windowssystem32msxml.dll /s
regsvr32 c:windowssystem32actxprxy.dll /s
regsvr32 c:windowssystem32shdocvw.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

Now after that, start all the below services.

net start wuauserv
net start bits
net start cryptsvc

And finally, now check your Windows Update


source: http://www.winlinhack.com/windows-updates-error-code-8024a000-solution-in-windows-7.html