How Long Does a Windows Update Take?
Quick Answer
15–60 minutes for regular cumulative updates, 1–4 hours for major feature updates. Download speed depends on your internet connection; installation time depends on your hardware.
Typical Duration
Quick Answer
15–60 minutes is typical for a standard monthly cumulative update on Windows 10 or 11. Major feature updates (released once or twice a year) take 1–4 hours. The process has two phases: downloading the update files (internet-dependent) and installing them (hardware-dependent), with a required restart in between.
Update Type Comparison
| Update Type | Download Size | Install Time | Frequency | Restart Required |
|---|---|---|---|---|
| Cumulative (monthly security) | 200 MB–1.5 GB | 10–30 minutes | Monthly (Patch Tuesday) | Yes |
| Feature update (e.g., 24H2) | 3–5 GB | 30 minutes–2 hours | Annual (Windows 11) | Yes |
| Driver updates | 10–500 MB | 5–15 minutes | As needed | Sometimes |
| .NET / runtime updates | 50–200 MB | 5–10 minutes | Monthly | Sometimes |
| BIOS/firmware (via Windows Update) | 10–50 MB | 5–15 minutes | Rare | Yes |
| Windows upgrade (10 → 11) | 4–6 GB | 1–4 hours | One-time | Yes |
Download vs. Install Phases
Download phase happens in the background while you work. Time depends entirely on your internet speed:
| Internet Speed | 1 GB Download Time |
|---|---|
| 10 Mbps | ~14 minutes |
| 50 Mbps | ~3 minutes |
| 100 Mbps | ~90 seconds |
| 500 Mbps | ~16 seconds |
Installation phase happens partly in the background and partly during restart. The restart portion shows "Working on updates... X% complete" and cannot be interrupted. Factors affecting install time:
- Storage type: SSDs install updates 3–5x faster than HDDs. An NVMe SSD is fastest.
- Processor speed: Faster CPUs process update operations more quickly.
- RAM: 8 GB or more helps; 4 GB systems are noticeably slower.
- Number of pending updates: If you've skipped several months, updates stack and take longer.
Why Some Updates Take So Long
Feature updates essentially perform a partial operating system reinstall. Windows backs up your current system, extracts the new OS files, migrates your settings and applications, and then cleans up the old installation. This multi-stage process explains why feature updates can take over an hour even on fast hardware.
Cumulative updates are smaller because they patch existing files rather than replacing the OS. However, they can still take 20–30 minutes on older hardware or spinning hard drives.
Troubleshooting Stuck Updates
If your update appears stuck at a specific percentage for more than 2 hours:
- Wait longer: Some updates genuinely take time at certain percentage points (30%, 73%, and 100% are common stall points). Wait at least 3 hours before intervening.
- Check disk activity: If the hard drive light is still blinking, the update is still working. Do not force a shutdown.
- Run the Windows Update Troubleshooter: Settings > System > Troubleshoot > Other troubleshooters > Windows Update.
- Clear the update cache: Stop the Windows Update service, delete the contents of `C:\Windows\SoftwareDistribution\Download`, and restart the service.
- Use DISM and SFC: Run `DISM /Online /Cleanup-Image /RestoreHealth` followed by `sfc /scannow` in an elevated command prompt to repair corrupted system files.
- Last resort: Force restart only if there has been zero disk activity for 30+ minutes. This can corrupt the installation.
Scheduling Tips
- Set active hours: Go to Settings > Windows Update > Advanced options > Active hours. Windows won't restart during these times.
- Pause updates: You can pause updates for up to 5 weeks if you need uninterrupted computer access.
- Schedule restart: After an update downloads, choose "Schedule the restart" to pick a convenient time.
- Update before bed: Manually check for updates in the evening and restart before going to sleep.
- Keep up to date: Monthly updates are smaller and faster when you don't skip them. Falling behind means larger, longer cumulative patches.