How to Fix Windows Update Problems

Windows Update is supposed to run quietly in the background — but sometimes it gets stuck, throws an error code, or simply refuses to download. This is one of the most common Windows complaints, and the good news is that most problems can be fixed without reinstalling Windows.

Here are 6 proven fixes — try them in order until your updates work again.

Fix 1: Run the Windows Update Troubleshooter

Windows has a built-in troubleshooter that automatically detects and fixes the most common update problems. Always try this first — it solves the issue in many cases.

1

Press Windows + I to open Settings

2

Go to System → Troubleshoot → Other troubleshooters

3

Find Windows Update and click Run

4

Follow the on-screen steps and apply any fixes it recommends, then restart your PC and try updating again

💡 Pro Tip

On Windows 10, go to Settings → Update & Security → Troubleshoot → Additional troubleshooters → Windows Update instead.

Fix 2: Clear the Windows Update Cache

Windows stores downloaded update files in a cache folder. If any of those files are corrupted, the update will fail every time. Deleting the cache forces Windows to download fresh copies.

1

Press Windows + S, search for Services, and open it

2

Find Windows Update in the list → right-click → Stop

3

Open File Explorer and navigate to this folder:

C:\Windows\SoftwareDistribution\Download

4

Select all files (Ctrl + A) and delete them

5

Go back to Services → right-click Windows Update → Start, then try updating again

⚠️ Note

You are only deleting temporary downloaded files — not any installed updates or system files. This is completely safe.

Fix 3: Reset Windows Update Components

If the cache clear did not work, you can reset all Windows Update services and components using Command Prompt. This is one of the most effective fixes for stubborn update errors.

1

Press Windows + S, search for Command Prompt, right-click it and choose Run as administrator

2

Run each of these commands one at a time, pressing Enter after each:

net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver

3

Then run these commands to rename the corrupted cache folders:

ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
ren C:\Windows\System32\catroot2 catroot2.old

4

Restart the services:

net start wuauserv
net start cryptSvc
net start bits
net start msiserver

5

Restart your PC and check for updates again

Fix 4: Run SFC and DISM to Repair System Files

Corrupted Windows system files can cause update failures. The SFC (System File Checker) and DISM tools scan and repair these files automatically.

1

Open Command Prompt as administrator (same as Fix 3, Step 1)

2

Run the DISM tool first:

DISM /Online /Cleanup-Image /RestoreHealth

This may take 10–15 minutes. Wait for it to complete.

3

Then run SFC:

sfc /scannow

4

Once both complete, restart your PC and try Windows Update again

💡 Pro Tip

Always run DISM first, then SFC. DISM repairs the Windows image that SFC uses as a reference — so running SFC alone on a corrupted system may not fully fix the problem.

Fix 5: Check Disk Space and System Date & Time

Two surprisingly common causes of update failures are not enough disk space and an incorrect system clock. Windows Update requires both to work correctly.

1

Open File Explorer → This PC — make sure your C: drive has at least 10 GB free

2

Right-click the clock in the taskbar → Adjust date and time

3

Make sure Set time automatically and Set time zone automatically are both turned On

Fix 6: Install the Update Manually

If a specific update keeps failing, you can download and install it manually from Microsoft's Update Catalog website — bypassing Windows Update entirely.

1

Note the KB number of the failing update (e.g., KB5034765) — visible in Windows Update history

2

Visit catalog.update.microsoft.com and search for the KB number

3

Download the version matching your system (x64 for most modern PCs)

4

Run the downloaded .msu file and follow the installer — then restart your PC

⚠️ Caution

Only download updates from the official Microsoft Update Catalog (catalog.update.microsoft.com). Never download Windows updates from third-party websites.

Conclusion

Most Windows Update problems can be solved without reinstalling Windows. Start with the Troubleshooter, move on to clearing the cache, then use SFC and DISM if needed. In almost all cases, one of these six fixes will get your updates working again.

If none of these work, check Windows Update history for the exact error code and search Microsoft's support site for a specific fix for that code.