Windows Update se koristi za ažuriranje Microsoft Windowsa^{(Microsoft Windows)} i drugih Microsoftovih^(Microsoft) programa. Budući da je jedna od najvažnijih usluga za operativni sustav, redovito preuzima i instalira sigurnosna ažuriranja za Windows . Međutim, ponekad mogu uzrokovati pogreške što u toj situaciji postaje vrlo uznemirujući trenutak. Jedna takva pogreška je pogreška Windows Update ^{(Windows Update Error)} C8000266 .

C8000266: Windows Update encountered an unknown error

U ovom vodiču objasnili smo neka brza rješenja koja će vam možda pomoći da se riješite ovog problema. Dakle, krenimo.

Pogreška Windows Update C8000266

Da biste popravili pogrešku Windows Update C8000266^{(Windows Update Error C8000266)} , slijedite donji prijedlog:

1. Pokrenite alat za rješavanje problema Windows Update
2. Poništite komponente Windows Updates

Pogledajmo ih detaljnije:

1] Pokrenite alat za rješavanje problema Windows Update^{(Run Windows Update Troubleshooter)}

Alat za rješavanje problema Windows Update izvrstan je ugrađeni alat koji sigurno može riješiti većinu uobičajenih problema vezanih uz ažuriranje na računalu. Postupak za pokretanje ove aplikacije je sljedeći:

Da biste započeli, prvo otvorite postavke sustava Windows ^{(open the Windows Settings)} (Win+I) .

Zatim odaberite Ažuriranje i sigurnost^{(Update & Security)} > Troubleshoot > Additional troubleshooters.

Na sljedećoj stranici odaberite Windows Update , a zatim kliknite gumb Pokreni alat za rješavanje problema ^{(Run the troubleshooter )} .

Pričekajte^(Wait) neko vrijeme dok ne otkrije i riješi problem.

Nakon što završi postupak, zatvorite alat za rješavanje problema i ponovno pokrenite uređaj.

Nadalje, također možete pokušati pokrenuti Windows Update Online Troubleshooter .

Sada idite na Windows Update i pokušajte instalirati ažuriranje na čekanju.

Ako se i dalje suočavate s problemom, prijeđite na sljedeće moguće rješenje.

2] Poništite^(Reset) komponente Windows ažuriranja

Ako pokretanje programa Windows Update Troubleshooter^{(Windows Update Troubleshooter)} ne riješi problem, možete ručno resetirati komponente Windows Updates . ^{(Windows Updates Components)}Evo kratkog vodiča koji možete koristiti za to:

Otvorite dijaloški okvir Pokreni pomoću tipkovnog prečaca Win+R

Upišite cmd i pritisnite Ctrl+Shift+Enter da otvorite povišeni naredbeni redak.

Ako UAC zatraži na zaslonu, kliknite Da da biste im dali dopuštenje.

U povišenom prozoru naredbenog retka upišite sljedeće naredbe i pritisnite enter u svakom retku.

net stop bits
net stop wuauserv
net stop appidsvc
net stop cryptsvc

Time će se prestati pokretati pozadinska inteligentna usluga prijenosa^{(Background Intelligent Transfer Service)} ili BITS , usluga Windows Update i kriptografska^{(Cryptographic)} usluga.

Sada morate resetirati komponente Windows Update uklanjanjem svih qmgr*.dat datoteka sa svog uređaja.

Da biste to učinili, upišite naredbeni redak ispod u naredbeni redak i pritisnite enter da biste ga izvršili.

Del "%ALLUSERSPROFILE%\Application Data\Microsoft\Network\Downloader\qmgr*.dat"

Da biste potvrdili brisanje, upišite Y s tipkovnice.

Zatim preimenujte mape SoftwareDistribution  i  catroot2 .

Da biste to učinili, upišite sljedeće naredbe u prozor naredbenog retka. Također, obavezno pritisnite enter nakon što upišete svaku naredbu.

Ren %systemroot%\SoftwareDistribution SoftwareDistribution.bak
Ren %systemroot%\system32\catroot2 catroot2.bak

Zatim morate resetirati uslugu BITS i uslugu Windows Update na zadani sigurnosni deskriptor

Da biste to učinili, upišite donje naredbe u prozoru povišenog naredbenog retka:

sc.exe sdset bits D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)
sc.exe sdset wuauserv D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)

Pritisnite^(Press) enter da izvršite naredbu i pritisnite enter nakon svake.

Upišite donji tekstualni kod u prozor naredbenog retka da biste prešli u imenik System32 . Zatim pritisnite Enter .

cd /d %windir%\system32

Sada unesite sljedeće naredbe i obavezno pritisnite enter nakon svake naredbe koju tamo upišete.

regsvr32.exe atl.dll
regsvr32.exe urlmon.dll
regsvr32.exe mshtml.dll
regsvr32.exe shdocvw.dll
regsvr32.exe browseui.dll
regsvr32.exe jscript.dll
regsvr32.exe vbscript.dll
regsvr32.exe scrrun.dll
regsvr32.exe msxml.dll
regsvr32.exe msxml3.dll
regsvr32.exe msxml6.dll
regsvr32.exe actxprxy.dll
regsvr32.exe softpub.dll
regsvr32.exe wintrust.dll
regsvr32.exe dssenh.dll
regsvr32.exe rsaenh.dll
regsvr32.exe gpkcsp.dll
regsvr32.exe sccbase.dll
regsvr32.exe slbcsp.dll
regsvr32.exe cryptdlg.dll
regsvr32.exe oleaut32.dll
regsvr32.exe ole32.dll
regsvr32.exe shell32.dll
regsvr32.exe initpki.dll
regsvr32.exe wuapi.dll
regsvr32.exe wuaueng.dll
regsvr32.exe wuaueng1.dll
regsvr32.exe wucltui.dll
regsvr32.exe wups.dll
regsvr32.exe wups2.dll
regsvr32.exe wuweb.dll
regsvr32.exe qmgr.dll
regsvr32.exe qmgrprxy.dll
regsvr32.exe wucltux.dll
regsvr32.exe muweb.dll
regsvr32.exe wuwebv.dll

Ovo će ponovno registrirati sve odgovarajuće BITS datoteke i DLL datoteke povezane s Windows Update

Sada morate resetirati mrežne konfiguracije koje bi mogle biti uloga problematične pogreške.

Da biste to učinili, upišite donji naredbeni redak i pritisnite enter nakon svake.

netsh winsock reset
netsh winsock reset proxy

Nakon što je sve dovršeno, morate ponovno pokrenuti usluge koje ste ranije zaustavili, kao što su pozadinska inteligentna usluga prijenosa^{(Background Intelligent Transfer Service)} ili BITS , Windows Update i kriptografske^{(Cryptographic)} usluge.

Da biste to učinili, ponovno idite na naredbeni redak i upišite naredbeni redak ispod. Također, ne zaboravite pritisnuti enter nakon svake naredbe.

net start bits
net start wuauserv
net start appidsvc
net start cryptsvc

Konačno, upišite Exit u naredbeni redak^{(Command Prompt)} da biste zatvorili prozor.

Nakon što dovršite cijeli proces, ponovno pokrenite Windows PC da biste primijenili promjene.

Nakon što se pokrene, idite na Windows Updates i pokušajte instalirati ažuriranja na čekanju dostupna na računalu.

Nadamo se da će vam gore spomenuta metoda pomoći da riješite ovaj problem. ^{(We hope the above-mentioned method would help you to resolve this issue. )}

Fix Windows Update Error C8000266?

Windows Update is used to keep Microsoft Windows and other Micrоsoft programs updated. Being оne of the most essential services for the operating system, it downloads and installs the security updates regularlу to Windows. However, they can cause errors at times that becоmes a highly disturbіng moment at that situation. One such error is Windows Update Error C8000266.

C8000266: Windows Update encountered an unknown error

In this guide, we have explained some quick fixes that will possibly help you to get rid of this problem. So, let’s get started.

Windows Update Error C8000266

To fix Windows Update Error C8000266, follow the below suggestion:

1. Run Windows Update Troubleshooter
2. Reset the Windows Updates Components

Let us see them in details:

1] Run Windows Update Troubleshooter

The Windows Update troubleshooter is a great built-in tool that can certainly fix most of the common update related issues on the computer. The procedure to run this application is as follows:

To get it started, open the Windows Settings (Win+I) first.

Then select Update & Security > Troubleshoot > Additional troubleshooters.

On the next page, select Windows Update and then click Run the troubleshooter button.

Wait for a while until it detects and solves the problem throughout.

Once it completes the process, close the troubleshooter, and restart your device.

Furthermore, you can also try running the Windows Update Online Troubleshooter.

Now go to the Windows Update and try to install the pending update.

If you’re still facing the problem move down to the next potential solution.

2] Reset the Windows Updates Components

If running Windows Update Troubleshooter doesn’t fix the problem, you can reset the Windows Updates Components manually. Here is a quick guide you can use to do so:

Open Run dialog box using Win+R keyboard shortcut.

Type in cmd and press Ctrl+Shift+Enter to open an elevated command prompt.

If UAC prompts on the screen, click Yes to grant them permission.

On the elevated command prompt window, type in the following commands and hit enter on each line.

net stop bits
net stop wuauserv
net stop appidsvc
net stop cryptsvc

This will stop running the Background Intelligent Transfer Service or BITS, Windows Update service, and Cryptographic service.

Now you need to reset Windows Update components by removing all the qmgr*.dat files from your device.

To do so, type the below command-line in the command prompt and hit enter to execute it.

Del "%ALLUSERSPROFILE%\Application Data\Microsoft\Network\Downloader\qmgr*.dat"

To confirm the deletion, type Y from your keyboard.

Next, rename the SoftwareDistribution and catroot2 folders.

To do that, type the following commands in the command prompt window. Also, make sure to hit enter after you type each command.

Ren %systemroot%\SoftwareDistribution SoftwareDistribution.bak
Ren %systemroot%\system32\catroot2 catroot2.bak

Next, you have to reset the BITS service and the Windows Update service to its default security descriptor

To do this, type the below commands in the elevated command prompt window:

sc.exe sdset bits D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)
sc.exe sdset wuauserv D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)

Press enter to execute the command and hit enter after each one.

Type the below text code in the command prompt window to move to the System32 directory. Then press Enter.

cd /d %windir%\system32

Now input the following commands and make sure to hit enter after each command you type there.

regsvr32.exe atl.dll
regsvr32.exe urlmon.dll
regsvr32.exe mshtml.dll
regsvr32.exe shdocvw.dll
regsvr32.exe browseui.dll
regsvr32.exe jscript.dll
regsvr32.exe vbscript.dll
regsvr32.exe scrrun.dll
regsvr32.exe msxml.dll
regsvr32.exe msxml3.dll
regsvr32.exe msxml6.dll
regsvr32.exe actxprxy.dll
regsvr32.exe softpub.dll
regsvr32.exe wintrust.dll
regsvr32.exe dssenh.dll
regsvr32.exe rsaenh.dll
regsvr32.exe gpkcsp.dll
regsvr32.exe sccbase.dll
regsvr32.exe slbcsp.dll
regsvr32.exe cryptdlg.dll
regsvr32.exe oleaut32.dll
regsvr32.exe ole32.dll
regsvr32.exe shell32.dll
regsvr32.exe initpki.dll
regsvr32.exe wuapi.dll
regsvr32.exe wuaueng.dll
regsvr32.exe wuaueng1.dll
regsvr32.exe wucltui.dll
regsvr32.exe wups.dll
regsvr32.exe wups2.dll
regsvr32.exe wuweb.dll
regsvr32.exe qmgr.dll
regsvr32.exe qmgrprxy.dll
regsvr32.exe wucltux.dll
regsvr32.exe muweb.dll
regsvr32.exe wuwebv.dll

This will re-register all the respective BITS files and Windows Update related DLL files

Now you need to reset the network configurations that might be the role of the problematic error.

To do so, type in the below command-line and hit enter after each one.

netsh winsock reset
netsh winsock reset proxy

Once it is all completed, you need to restart the services you stopped it earlier like Background Intelligent Transfer Service or BITS, Windows Update, and Cryptographic services.

To do so, again go to the command prompt and type in the below command line. Also, don’t forget to press enter after each command.

net start bits
net start wuauserv
net start appidsvc
net start cryptsvc

Finally, type Exit in the Command Prompt to close the window.

Once you complete the entire process, restart your Windows PC to apply the changes.

After it starts up, go to the Windows Updates and try to install the pending updates available on the computer.

We hope the above-mentioned method would help you to resolve this issue. 

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