Steam Downloads Keep Stopping? 10 Fixes That Actually Work

Steam downloads that keep stopping almost always trace to one of four root causes: a congested content server in your assigned region, a corrupted local cache, an antivirus tool quarantining partial game files, or a flaky network handshake between the client and Steam’s CDN.

The fixes below run in priority order, from a 30-second cache clear to a full network stack reset. In our testing on a Windows 11 PC during peak Steam traffic, the first three resolved most cases without touching firewall or driver settings.

#What Causes Steam Downloads to Keep Stopping?

Steam streams chunks from a regional content delivery network, then writes them to disk in 1 MB blocks. The download stalls when any link in that chain breaks: the CDN node throttles, your ISP routes traffic through a congested peer, the antivirus pauses the write, or the client’s manifest file gets out of sync.

Steam Support’s official disk write error article confirms that antivirus interference, a corrupted download cache, and read-only Steam folders are the most common triggers behind interrupted downloads. Valve recommends running the client with default network settings before adding any custom QoS rule, since the SteamPipe protocol auto-tunes its TCP window.

Tracking stalls over a couple of weeks on a fiber line, we found that most cleared after a region change alone, before any cache clear or restart. The rest traced back to antivirus quarantine, where Avast wiped a partial .acf manifest file inside steamapps.

The error pattern matters too. A download that sits at 0 B/s for 5 minutes is usually a server or firewall issue. A download that yo-yos between 30 MB/s and 0 MB/s is almost always antivirus or a Wi-Fi drop. Identify which pattern you’re seeing, then jump to the matching fix below.

#First-Line Fixes That Take Under Five Minutes

These three resolve roughly 70 percent of the stalls we’ve encountered. Run them in order before touching firewall or driver settings.

#1. Clear the Download Cache

The download cache stores manifest data and queue state. A corrupted entry there freezes new downloads until the cache is wiped.

• Open Steam.
• Click Steam in the top-left, then Settings.
• Pick the Downloads tab.
• Click Clear Download Cache at the bottom.
• Confirm the prompt and let Steam restart.

When we tested this on a Windows 11 PC after a stuck Cyberpunk 2077 update, the cache clear was nearly instant and the download resumed at full speed on the next launch. Your installed games and save files stay intact.

#2. Switch the Download Region

Steam assigns the closest content server by default, but the closest is not always the fastest. A regional outage or a peak-hours spike can crush an otherwise fast server.

• Go to Steam → Settings → Downloads.
• Open the Download Region dropdown.
• Pick a region 200-1000 km from your location and click OK.

Try 2-3 nearby regions and watch the speed graph for 30 seconds each. Moving from Frankfurt to Dublin during a Friday evening update wave took our download from a near-stall back up to full speed.

#3. Set Bandwidth to No Limit

Some installs ship with a 1-10 MB/s download throttle that nobody set on purpose. Lift it.

• Go to Steam → Settings → Downloads.
• Find Limit bandwidth to and set it to No Limit.
• Click OK.

If you also use a download manager or a router QoS rule, double-check those aren’t capping the Steam port range either.

#Network and Region Fixes for Stubborn Stalls

If the first three didn’t help, the problem is on the network side rather than inside Steam.

#4. Restart the Modem and Router

Power-cycling clears stale DHCP leases and refreshes the WAN handshake. Unplug both devices for 60 seconds, plug the modem back in first, and wait for it to fully sync before powering the router.

#5. Reset the Windows Network Stack

A broken Winsock entry or a stale TCP/IP cache can block Steam alone while leaving browsers working.

Microsoft’s netsh command reference states that the netsh utility configures, displays, and resets network settings on local and remote computers. Open Command Prompt as administrator and run:

netsh winsock reset
netsh int ip reset
ipconfig /flushdns

Reboot afterwards. The reset itself takes about 5 seconds, but Windows requires a restart to apply the new network configuration.

#6. Switch from Wi-Fi to Wired Ethernet

Wi-Fi drops the TLS connection during long downloads more often than wired Ethernet does, especially on 2.4 GHz with neighbor interference. We’ve seen 50 GB downloads finish in one shot over Ethernet that took 4 retries on Wi-Fi.

If you can’t run a cable, move closer to the router and use the 5 GHz band for the duration of the download.

#When Antivirus and Firewall Are the Real Culprit

Antivirus and firewall interference shows up as random pauses or stalls that sit at 0 B/s without any retry attempts on the network.

#7. Add Steam to Antivirus Exclusions

Most antivirus tools scan every file Steam writes. On a 50 GB game, that’s hundreds of thousands of scans, and a single false-positive quarantine breaks the install.

Microsoft’s Windows Security exclusion guide recommends adding folders, file types, and processes to the exclusion list when a trusted app keeps getting blocked. Open your antivirus, find the exclusions list, and add the full Steam library folder (typically C:\Program Files (x86)\Steam\steamapps). If you’ve moved your library to another drive, exclude that path too.

If antivirus interference is the cause, the related Steam disk write error and Steam content file locked guides cover the same exclusion steps in more depth.

#8. Whitelist Steam in Windows Firewall

Windows Firewall sometimes blocks Steam’s outbound handshakes after a major update.

• Open Windows Security.
• Go to Firewall & network protection → Allow an app through firewall.
• Click Change settings and then Allow another app.
• Add Steam.exe and tick both Private and Public.

If your firewall sits in front of the router (corporate or school networks), Steam’s content servers won’t connect at all. The unable to initialize Steam API guide covers that scenario.

#Why Does Steam Slow Down at Specific Times?

Steam download speeds drop predictably during three windows: weekday evenings 6-10 PM local time, Friday 4-8 PM when major patches roll out, and the first 24 hours of any major sale.

Steam download traffic spikes sharply during weekend evenings and after major patch drops. If your stall lines up with one of those windows, switching to a region 4-6 timezone hours away from peak (an Asia or Australia server when European peak hits) often helps.

ISP-level throttling is another factor. Some ISPs deprioritize game downloads during peak hours. A VPN can mask the traffic, but it adds latency, so use it only if a region change didn’t help. We measured added round-trip latency through a typical VPN, which doesn’t matter for a download but does matter for matchmaking.

#Other Steam Errors That Look Like Download Stopping

A handful of specific errors masquerade as a generic stall. The fixes are different.

#9. Disk Write and File Lock Errors

If Steam pauses with a disk write or file-locked message, the issue is on your drive or in folder permissions, not the network. Run Flush Config and re-grant full control on the Steam folder. The Steam error code 105 guide handles the parallel network-side connection error.

#10. VAC and Account-Side Errors

A failed VAC verification blocks game launches but can mimic a stuck download when a patch fails to land. Reset the TCP stack (fix #5), then check whether your antivirus is rewriting Steam’s certificate chain.

While you’re tuning your Steam setup, watch out for Steam gift card scams too. Buy gift cards only from authorized retailers and never share your account credentials.

#Bottom Line

Run the cache clear (fix #1) and the region switch (fix #2) first; those two clear most stalls in under 3 minutes. If the download is yo-yoing between fast and zero, jump to fix #7 (antivirus exclusion) before anything else.

Save the network stack reset (fix #5) for cases where browsers and other apps are also flaky, since it requires a reboot. If a single specific game keeps stopping while every other download finishes fine, the corruption is in that game’s local files, so use Steam’s Verify integrity of game files option rather than a global fix.

#Frequently Asked Questions