How to Fix Windows Update Error: 0x8007045b, 0x800f0983 & More

Few things are as frustrating as clicking “Check for updates” only to see a failed installation with a cryptic error code. If you’ve run into 0x8007045b, 0x800f0983, or 0x8007042b, you’re not alone — and the fix is often simpler than it looks.

Error codes covered: 3 (0x8007045b, 0x800f0983, 0x8007042b) ·
Troubleshooting methods detailed: 7 ·
Official Microsoft tool: Windows Update Troubleshooter ·
Source of methods: Action1 blog and Microsoft Support ·
Supported Windows versions: 10 and 11

Five key facts at a glance — the snapshot below shows the status of each major error and the upcoming Windows versions that often confuse users.

How can I fix a Windows Update error?

Run the Windows Update Troubleshooter

• Open Settings → Update & Security → Troubleshoot (Windows 10) or Settings → System → Troubleshoot → Other troubleshooters (Windows 11) – path differs by version (Microsoft Learn official Q&A).
• Select Windows Update and run the troubleshooter. It can automatically detect and fix common issues (Microsoft Support official tool page).

Reset Windows Update components

• Open Command Prompt as administrator.
• Stop services: net stop wuauserv, net stop bits, net stop cryptsvc, net stop msiserver (TechPress tech help blog).
• Rename the SoftwareDistribution and catroot2 folders: ren C:\Windows\SoftwareDistribution SoftwareDistribution.old and ren C:\Windows\System32\catroot2 catroot2.old (SalvageData data recovery service blog).
• Reset WinHTTP proxy and Winsock: netsh winhttp reset proxy and netsh winsock reset (TechPress tech help blog).
• Restart services: net start wuauserv, net start bits, net start cryptsvc, net start msiserver.

Use System File Checker (SFC) and DISM

• Run sfc /scannow to scan and repair corrupt system files (Prajwal Desai IT support guide).
• Then run DISM /Online /Cleanup-Image /RestoreHealth to fix the system image (Prajwal Desai IT support guide).
• Restart your PC after both commands complete.

The pattern: The built‑in tools fix most problems, but component reset is the heavy‑lifter for persistent failures.

How do I fix error code 0x8007045b?

Check Windows Update service status

• Press Win + R, type services.msc, and press Enter.
• Locate the Windows Update service. If it’s not running, right‑click and select Start. Set its startup type to Automatic (SalvageData data recovery service blog).

Clear SoftwareDistribution folder

• Stop the Windows Update service as shown above.
• Navigate to C:\Windows\SoftwareDistribution and delete all its contents. This forces a fresh download of updates when the service restarts (SalvageData data recovery service blog).

Perform a clean boot

• Open msconfig (System Configuration) and choose Selective startup.
• Uncheck Load startup items, then go to the Services tab, check Hide all Microsoft services, and click Disable all (SalvageData data recovery service blog).
• Restart and try Windows Update again.

The catch: A clean boot isolates third‑party interference — if updates work after this, you know a startup program or service was blocking the process.

How to fix Windows Update error 0x8007042b?

Run the Windows Update Troubleshooter

• Same steps as the general method above. The troubleshooter also checks network connectivity, which is the root cause of 0x8007042b (Microsoft Support official tool page).

Disable VPN and proxy settings

• Temporarily turn off any VPN client (NordVPN, ExpressVPN, etc.) and uncheck Use a proxy server in Settings → Network & Internet → Proxy (TechPress tech help blog).
• Also disable any third‑party firewall or antivirus that might be blocking Windows Update traffic.

Add firewall exceptions for Windows Update

• Open Windows Defender Firewall and allow the app wuauclt.exe or svchost.exe (for Windows Update) through the firewall (SalvageData data recovery service blog).
• Ensure port 80 and 443 are open for outbound connections.

The implication: Network blocks are the primary cause of 0x8007042b — once the path is clear, updates usually flow.

How to fix “We couldn’t install this update but you can try again” (0x800f0983)

Free up disk space

• Delete temporary files via Settings → System → Storage → Temporary files (Microsoft Learn official Q&A).
• Aim for at least 20 GB of free space on the system drive.

Run DISM and SFC scans

• Execute DISM /Online /Cleanup-Image /RestoreHealth and then sfc /scannow as described earlier (Prajwal Desai IT support guide).

Manually download the cumulative update

• Visit the Microsoft Update Catalog official download site.
• Search for the KB number of the failed update, download the correct package for your system (x64 or x86), and run the .msu file (Microsoft Learn official Q&A).

The trade‑off: Manual download bypasses the auto‑update mechanism but ensures the update is delivered if the service is corrupt.

Why does my PC keep saying update failed?

Common reasons for update failure

• Insufficient disk space (Microsoft Learn official Q&A).
• Corrupted system files (Prajwal Desai IT support guide).
• Third‑party software conflicts (antivirus, VPN) (TechPress tech help blog).
• Corrupt Windows Update cache (SalvageData data recovery service blog).

How to check the Windows Update log

• Open C:\Windows\WindowsUpdate.log with Notepad. Look for error codes like 0x800f0983 or 0x8007042b (Microsoft Learn official Q&A).
• The log provides timestamps and specific failure points to guide your fix.

When to reinstall Windows

• If all fixes fail, consider an in‑place upgrade using the Media Creation Tool (YouTube repair walkthrough). This reinstalls Windows while preserving your files.
• As a last resort, use Settings → Update & Security → Recovery → Reset this PC (keep files option) (YouTube Windows 11 guide).

The pattern: Update failures almost always trace back to one of four root causes — space, corruption, software conflict, or cache. The log reveals which.

Perspectives from the experts

“The Windows Update Troubleshooter is recommended first step for any Windows Update error. It can automatically detect and fix common issues without manual intervention.”

– Microsoft Support documentation (official troubleshooting guide)

“If the troubleshooter fails, a full reset of Windows Update components — stopping services, renaming SoftwareDistribution and catroot2, and restarting services — is the most thorough manual method to fix persistent errors across different error codes.”

– Action1 blog (IT management platform blog)

For Windows users facing repeated update errors, the choice is clear: start with the automated troubleshooter, then escalate to manual component resets and system file repairs. Most failures — including the three error codes covered here — can be resolved without reinstalling Windows, saving hours of downtime.

For a comprehensive walkthrough covering additional error codes like 0x80070103, refer to this detailed Windows Update error guide from UK Pressroom.

Frequently asked questions