How to fix Steam error "No download source" in Windows?

"No Download Source" means Steam asked its content servers for a game's files and none of them could hand them over, so the update or install stops with "Content unavailable". Most often the servers of your download region are slow or behind. Change the download region in Steam's settings first.

Facts checked on 15 October 2026. Steps written for the Steam client on Windows 11 (25H2 and 26H2) and Windows 10 22H2, read against Steam Support's page on update and installation errors and the Steam client's own text file.

What the Steam "No download source" error means and where it shows

Steam does not keep games on one server. It splits each game into pieces and spreads them over content servers in many regions, then picks the servers of the region it thinks you are in. When the client asks for a piece and no server answers with it, the download has no source, and Steam stops.

The window most readers see reads: "An error occurred while updating Dota 2 (content unavailable) :" with the line "No Download Source" under it. The name of the game changes, the rest stays the same. Steam Support explains that the reason for an update error is always the text in brackets at the end.

What causes "Content unavailable: No download source", from most to least likely

Valve publishes no numbers on this error. The order below follows Steam Support's own list of fixes for update errors and what readers describe: a fresh game update, a region that worked yesterday, a download that stops at once.

How to fix Steam "No download source"

Fixes 1 and 2 answer the causes behind most cases and take two minutes each. Fixes 3 and 4 repair the library and the game's files. Fix 5 looks at your connection, Fix 6 at the game's side, and Fix 7 rebuilds Steam without deleting your games.

Fix 1. Change the download region in Steam's settings

2 minutesNo riskEveryone starts here, and above all when a new update just came out or the download stops at once.

Steam picks content servers in your own region. Steam Support says those servers "may be slow, overloaded or have a hardware failure" and advises a temporary switch to another region, which uses another set of servers.

1. Open Steam, select the Steam menu in the top left corner and choose Settings.
2. Select Downloads on the left.
3. Open the list next to Download region and pick another region close to you, for example a neighbouring city or country.
4. Close Settings. If Steam asks to restart, let it.
5. Open the Downloads page at the bottom of the Library and press the resume button next to the game.
6. If it fails again, pick a second region and try once more. Steam Support: "You may need to test several regions other than your own."

Fix 2. Clear Steam's download cache

2 minutesLow riskThe error stays after a change of region, or Steam keeps resuming the same broken download.

Steam keeps local data about what to download and from where. Steam Support says clearing the cache makes the client "flush locally cached configuration data and acquire it from the Steam servers again", so a stale list of sources is replaced.

1. Open the Steam menu and choose Settings.
2. Select Downloads on the left.
3. Next to Clear Download Cache, select Clear Cache.
4. Confirm with Ok. Steam warns that it "will clear your local download cache and restart Steam".
5. Sign in to Steam again when it restarts. Have your password and Steam Guard code ready.
6. Open Downloads and resume the game's update.

Clearing the cache does not remove installed games or saves. Steam's own text says it "might resolve issues downloading or starting apps", which covers both forms of this error.

Fix 3. Repair the Steam library folder

3 minutesLow riskGames on one drive or in one Steam library fail while others update, or the game sits on a second drive.

Steam Support says library folders "need to be writable by all users in order to update properly" and that these rights can break. Repair Folder sets them again, so Steam can write the downloaded pieces.

1. Open the Steam menu and choose Settings.
2. Select Storage on the left.
3. At the top, pick the drive that holds the game from the list of drives.
4. Select the ... button on the right.
5. Choose Repair Folder and confirm if Windows asks for administrator rights.
6. Wait until Steam reports that it is done, then resume the update in Downloads.

Steam Support also suggests a test on another drive: add a new library with Steam > Settings > Storage > + on a different disk and move or install the game there. If the update works there, the first drive is the problem. Check it for errors: Check a disk for errors (chkdsk)

Fix 4. Verify the game's files, then reinstall the game if needed

5 to 30 minutes, by the size of the gameLow riskOne game fails while others update, above all after a crash or a power cut during an update.

A half-written update leaves Steam asking for pieces that do not match what is on disk. Verifying compares the installed files with the originals and fetches what is missing or wrong, which gives the update a clean starting point.

1. Restart and open Steam. Restart your computer and launch Steam.
2. Open the game's menu. Right-click the game in your Library, or open the game's Library page and select the gear icon on the far right.
3. Open Properties. Select Properties in the menu.
4. Verify the files. Select the Installed Files tab and select Verify integrity of game files.
5. Wait for the result. Steam checks the game's files. This can take several minutes.

These steps were written for Steam on Windows. The full page with the other versions and what each result means: How to verify game files in Steam, Epic Games, Xbox app, EA app, Battle.net and GOG Galaxy

If verifying itself stops with "Content unavailable", the download is still the problem: go back to Fix 1 with another region. If verifying finishes and the update still fails, reinstall the game.

1. In the Library, right-click the game and choose Manage > Uninstall.
2. Restart the PC.
3. Open Steam, select the game and press Install.

Fix 5. Test the connection: VPN, proxy, router, firewall and antivirus

10 to 15 minutesLow riskEvery game fails, Steam also says "Content servers unreachable", or you use a VPN, a proxy or new security software.

Steam Support names firewalls, antivirus, proxies and "web-optimizers" as programs that can stop Steam from reaching its servers. It also notes that some providers "cache or compress online data", which breaks Steam downloads.

1. Disconnect any VPN and exit its app. Turn off a proxy under Settings > Network & internet > Proxy.
2. Restart the modem and the router: unplug them, wait 30 seconds and plug them in again. Steam Support lists this first among its advanced steps.
3. Add the Steam folder, by default C:\Program Files (x86)\Steam, and your Steam library folders to the exceptions of your antivirus and firewall.
4. Retry the update.
5. If it still fails, connect the PC to another network for one test, for example a phone hotspot. Steam Support advises a network "preferably from a different service provider".
6. If it works there, the problem is your usual network. Reset Windows' network settings: Reset the network and flush DNS
7. If it fails everywhere, do a clean boot to find a program on the PC that blocks Steam: How to perform a clean boot in Windows

Changing the DNS server, as some guides suggest, may help when your provider's DNS is broken, but Steam Support does not list it for this error. Try the steps above first. To check the connection itself: How to check your internet connection in Windows

Fix 6. Leave a game beta and check whether the problem is on the game's side

5 minutesLow riskYou joined a beta of the game, or many players report the same error on the same day.

A download has no source when the build Steam asks for is not on the content servers. That happens when a beta branch you joined was closed, or when a new build has not reached all servers yet. In a game developer's public issue tracker in July 2025, logs showed this exact line for freshly updated content, and only Valve's fix ended it.

1. In the Library, right-click the game and choose Properties.
2. Select Game Versions & Betas (older clients: Betas).
3. If a beta is selected, choose None to go back to the normal version.
4. Close the window and resume the download.
5. If you were not on a beta, open the game's page in the Library and read the latest news, or the game's Steam Community discussions, for reports of the same error today.
6. If many players report it, wait a few hours and retry. A change on your PC will not help while the build is missing on Steam's side.

Fix 7. Repair Steam by installing it over itself, without uninstalling

10 minutesRead the warningFixes 1 to 6 did not help, or Steam shows other errors too.

A fresh copy of the client replaces damaged Steam files, including the parts that handle downloads. Steam Support says to install into the same folder, which keeps your games.

1. Exit Steam through the Steam menu and Exit.
2. In a browser, open https://store.steampowered.com/about/ and download the Steam installer.
3. Run it and choose the folder where Steam is already installed, by default C:\Program Files (x86)\Steam. Steam Support: "Installing into same location will preserve all installed games."
4. Start Steam, let it update and sign in.
5. Open Downloads and resume the game's update.

Our guide to Steam error code 2 has the deeper repair from Steam Support, which deletes everything in the Steam folder except steam.exe, steamapps and userdata. Use it only if the reinstall over itself did not help.

If Steam still says "No download source": the log to read and whom to ask

Steam writes every download step to a text file. It shows which part of the game failed and why, which tells you whether the region, the disk or the game's build is the problem.

1. Exit Steam through Steam > Exit.
2. Open the folder C:\Program Files (x86)\Steam\logs in File Explorer.
3. Open content_log.txt with Notepad and press Ctrl + End to jump to the newest lines.
4. Look for a line with (Content unavailable) "No Download Source". It names the AppID and the depot that failed.
5. Look a few lines above for other reasons, such as Disk write error or Corrupt download. Those point to the drive (Fix 3) or to damaged files (Fix 4), not to the servers.

• When it is the game's build: the same depot fails from every region and on every network. Report it in the game's Steam discussions or to the developer through the game's Support link in the Library.
• When it is Steam: contact Steam Support at https://help.steampowered.com with the game, the time, the regions you tried and the lines from content_log.txt.
• When it is the drive: the log shows disk errors, or the game installs fine on another drive. Check the disk: Check a disk for errors (chkdsk)
• When it is the account: a game you do not own, or a free weekend that has ended, cannot download. The log then names a licence problem, not a download source.

How to keep "Content unavailable: No download source" from coming back

The rule behind it is short. Steam needs a reachable content server that holds the build you ask for, and a folder it can write to. Keep those two in order and the message stays rare.

Frequently asked questions

What does "No download source" mean on Steam?

It means Steam could not get a piece of the game's files from any content server. Steam spreads each game over servers in many regions, and the client asks the servers of your region for every piece. When none of them delivers it, Steam stops the download and shows "Content unavailable" with the detail "No Download Source". It does not mean your game is broken or your account is banned. Most often the servers of your region are slow or do not have the new update yet, which is why changing the download region (Fix 1) helps most readers.

What is "Content unavailable" on Steam?

It is the reason Steam gives when a download or update cannot get its files. Steam's client text file lists it as update error 40. You see it in the Downloads list next to the game, in the error window as "(content unavailable)", and in the log content_log.txt together with "No Download Source". The fixes are the same as on this page: change the download region, clear the download cache, repair the library folder and verify the game's files, in that order.

Why does the error show when I try to launch the game?

Because Steam will not start a game that has an update waiting. When you press Play, Steam first tries to finish the update. If that download has no source, you get "Content unavailable" instead of the game. The reader's question above is this case: Dota 2 would not start because its update failed. Fix the download with Fix 1 and Fix 2, let the update finish in the Downloads list, and the game will start again.

Why can't I download anything on Steam?

When every game fails, the problem is between your PC and Steam's servers, not in one game. Start with Fix 1 and Fix 2, because a bad region or a stale download cache stops every download at once. If that does not help, go to Fix 5: disconnect any VPN or proxy, restart the router, add Steam to your antivirus exceptions and test once on another network. Steam Support names firewalls, antivirus programs, proxies and providers that cache data as common reasons for downloads that never start.

Steam won't download games or updates and shows no error. Is this the same problem?

Not always. A download that sits at 0 bytes with no message is often paused, scheduled or limited. Check Steam > Settings > Downloads: Schedule auto-updates may restrict updates to certain hours, and Limit download speed may be set too low. Also check that the drive has free space. If the game then shows "Content unavailable" or "Content servers unreachable", follow the fixes on this page from Fix 1.

Is it Steam's fault or mine?

It can be either, and two tests tell them apart. Try two or three other download regions: if one works, it was the servers of your region. Try another network, such as a phone hotspot: if it works there, the problem is your network or a program on your PC. If the same game fails from every region and every network, and other players report it the same day, the problem is on Steam's or the game's side, and waiting a few hours is the fix.

Will clearing the download cache delete my games or saves?

No. Clearing the download cache removes only Steam's local data about downloads and then restarts Steam. Steam's own text says it "will clear your local download cache and restart Steam. You will need to login to Steam again." Your installed games, your saves and your settings stay where they are. Have your password and your Steam Guard code ready, because you have to sign in again after the restart.

Does changing DNS to 8.8.8.8 fix "No download source"?

Sometimes, but it is not the first thing to try. A DNS server only turns Steam's server names into addresses. If your provider's DNS is broken, Steam may find no servers, and a public DNS such as Google's 8.8.8.8 and 8.8.4.4 can help. Steam Support does not list DNS among its fixes for update errors. It lists the download region, the cache, the library folder and the network itself, so try Fixes 1 to 5 first.

I searched in Russian, Vietnamese, Arabic or Spanish. Is this the same error?

Yes. Readers reach this page with "что делать" (what to do), "lỗi gì đây" (what error is this), "sao ko tải dc" (why can't I download), "حل" (solution) and "no me sale para descargar" (it won't let me download). The Steam window is in your language, so look for the translation of "Content unavailable". The cause and the fixes are the same. Only the menu names differ, so follow the order of the steps: Steam menu, Settings, Downloads, then the region list.