How To Fix Windows 10 Update Service is Missing

In general, Windows update is pretty important since it can help computer users to update their operating system to the latest version. However, it is common for users to encounter some problems when updating the operating system. In such a situation, the Windows Update Troubleshooter plays an important role since it can help users to find and fix the Windows update problems.

However, some users complain that they have encounter the service registration is missing or corrupt Windows update error when they are running the Windows Update Troubleshooter and don’t know how to fix this problem service registration is missing or corrupt Windows
At here, you come to the right place. This post will show you how to fix the problem service registration is missing or corrupt. If you have the same issue, you can try the following solutions.
Method 1. Restore Windows Update Service in Registry
The main cause of the absence of the Windows Update Service from the list of Windows 10 services, is the lack (or the destruction) of the "Windows Update" registry key (wuauserv). To restore or repair the 'wuauserv' service registry key, follow the instructions below:
1. Open Registry Editor. Press the Windows Key

+ R to open run command box. Type regedit and press Enter.

2. At the left pane, navigate to the following registry location and expand the Services key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services4. Under the "Services" key, if you see the wuauserv registry key: *
3. Right click on it and select Export to backup the key for safety reasons. *

4. Save the Key to your Desktop with name Win10UpdateOld.reg

5. Then right click again on the wuauserv key and click Delete.

6. Close the Registry Editor.
7. Open Notepad application. Press the Windows Keys

+ R to open run command box. Type notepad and press Enter.

8. Select and copy/paste to notepad the below text (in bold letters):
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv]
"DependOnService"=hex(7):72,00,70,00,63,00,73,00,73,00,00,00,00,00
"Description"="@%systemroot%\\system32\\wuaueng.dll,-106"
"DisplayName"="@%systemroot%\\system32\\wuaueng.dll,-105"
"ErrorControl"=dword:00000001
"FailureActions"=hex:80,51,01,00,00,00,00,00,00,00,00,00,03,00,00,00,14,00,00,\
00,01,00,00,00,60,ea,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00
"ImagePath"=hex(2):25,00,73,00,79,00,73,00,74,00,65,00,6d,00,72,00,6f,00,6f,00,\
74,00,25,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,73,\
00,76,00,63,00,68,00,6f,00,73,00,74,00,2e,00,65,00,78,00,65,00,20,00,2d,00,\
6b,00,20,00,6e,00,65,00,74,00,73,00,76,00,63,00,73,00,20,00,2d,00,70,00,00,\
00
"ObjectName"="LocalSystem"
"RequiredPrivileges"=hex(7):53,00,65,00,41,00,75,00,64,00,69,00,74,00,50,00,72,\
00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,43,00,72,00,\
65,00,61,00,74,00,65,00,47,00,6c,00,6f,00,62,00,61,00,6c,00,50,00,72,00,69,\
00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,43,00,72,00,65,00,\
61,00,74,00,65,00,50,00,61,00,67,00,65,00,46,00,69,00,6c,00,65,00,50,00,72,\
00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,54,00,63,00,\
62,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,\
00,41,00,73,00,73,00,69,00,67,00,6e,00,50,00,72,00,69,00,6d,00,61,00,72,00,\
79,00,54,00,6f,00,6b,00,65,00,6e,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,\
00,67,00,65,00,00,00,53,00,65,00,49,00,6d,00,70,00,65,00,72,00,73,00,6f,00,\
6e,00,61,00,74,00,65,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,\
00,00,00,53,00,65,00,49,00,6e,00,63,00,72,00,65,00,61,00,73,00,65,00,51,00,\
75,00,6f,00,74,00,61,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,\
00,00,00,53,00,65,00,53,00,68,00,75,00,74,00,64,00,6f,00,77,00,6e,00,50,00,\
72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,44,00,65,\
00,62,00,75,00,67,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,\
00,00,53,00,65,00,42,00,61,00,63,00,6b,00,75,00,70,00,50,00,72,00,69,00,76,\
00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,52,00,65,00,73,00,74,00,\
6f,00,72,00,65,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,\
00,53,00,65,00,53,00,65,00,63,00,75,00,72,00,69,00,74,00,79,00,50,00,72,00,\
69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,54,00,61,00,6b,\
00,65,00,4f,00,77,00,6e,00,65,00,72,00,73,00,68,00,69,00,70,00,50,00,72,00,\
69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,4c,00,6f,00,61,\
00,64,00,44,00,72,00,69,00,76,00,65,00,72,00,50,00,72,00,69,00,76,00,69,00,\
6c,00,65,00,67,00,65,00,00,00,53,00,65,00,4d,00,61,00,6e,00,61,00,67,00,65,\
00,56,00,6f,00,6c,00,75,00,6d,00,65,00,50,00,72,00,69,00,76,00,69,00,6c,00,\
65,00,67,00,65,00,00,00,00,00
"ServiceSidType"=dword:00000001
"Start"=dword:00000003
"SvcHostSplitDisable"=dword:00000001
"SvcMemHardLimitInMB"=dword:000000f6
"SvcMemMidLimitInMB"=dword:000000a7
"SvcMemSoftLimitInMB"=dword:00000058
"Type"=dword:00000020

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv\Parameters]
"ServiceDll"=hex(2):25,00,73,00,79,00,73,00,74,00,65,00,6d,00,72,00,6f,00,6f,\
00,74,00,25,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,\
77,00,75,00,61,00,75,00,65,00,6e,00,67,00,2e,00,64,00,6c,00,6c,00,00,00
"ServiceDllUnloadOnStop"=dword:00000001
"ServiceMain"="WUServiceMain"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv\Security]
"Security"=hex:01,00,14,80,78,00,00,00,84,00,00,00,14,00,00,00,30,00,00,00,02,\
00,1c,00,01,00,00,00,02,80,14,00,ff,00,0f,00,01,01,00,00,00,00,00,01,00,00,\
00,00,02,00,48,00,03,00,00,00,00,00,14,00,9d,00,02,00,01,01,00,00,00,00,00,\
05,0b,00,00,00,00,00,18,00,ff,01,0f,00,01,02,00,00,00,00,00,05,20,00,00,00,\
20,02,00,00,00,00,14,00,ff,01,0f,00,01,01,00,00,00,00,00,05,12,00,00,00,01,\
01,00,00,00,00,00,05,12,00,00,00,01,01,00,00,00,00,00,05,12,00,00,00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv\TriggerInfo]

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv\TriggerInfo\0]
"Type"=dword:00000005
"Action"=dword:00000001
"Guid"=hex:e6,ca,9f,65,db,5b,a9,4d,b1,ff,ca,2a,17,8d,46,e0

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv\TriggerInfo\1]
"Type"=dword:00000005
"Action"=dword:00000001
"Guid"=hex:c8,46,fb,54,89,f0,4c,46,b1,fd,59,d1,b6,2c,3b,50
9. Then click File > Save as and save the file at your Desktop with name: Win10UpdateFix.reg.

10. Close Notepad.
11. Now double click at Win10UpdateFix.reg file and click Yes at UAC warning message.

12. Click Yes again to add the information to the registry. Finally click OK at the information message.
13. Restart your computer. After restart, proceed to check and install updates. The problem should be resolved.
Notes:
1. If the Windows Update problem is solved, then delete the .reg file(s) from you desktop and continue your work.
2. If the you still have problems then continue to the next method.
Method 2. FIX Windows corruption errors with DISM & SFC tools.
The next method fix the "Windows Update Service Missing" problem in Windows 10, is to repair the corrupted system files.
1. Open command prompt as administrator. In the Search box type: cmd or command prompt. Right click on the command prompt (result) and select Run as Administrator.

2. At the command prompt window, type the following command & press Enter:
Dism.exe /Online /Cleanup-Image /Restorehealth

3. Be patient until DISM repairs component store. When the operation is completed, (you should be informed that the component store corruption was repaired), give this command and press Enter:
SFC /SCANNOW