Windows 11 25h2 26200.7628 The bug still here Windows sandbox same error....
Windows Sandbox fails to open with 0x800705B4
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(108.80000000000001, 79%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMH%3C/text%3E%3C/svg%3E)
Michael Higham
265
Reputation points
I'm having a problem running Windows Sandbox on my Windows 11 PC.
When I start Windows Sandbox, it stalls at the logo for ten minutes or so, and then an error message shows up:
Restarting the PC and uninstalling and reinstalling Windows Sandbox don't correct the problem.
Anybody else experiencing this problem?
Windows for home | Windows 11 | Apps
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(32, 53%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDE%3C/text%3E%3C/svg%3E)
David Elliott 30 Reputation points2025-12-12T11:37:46.44+00:00 Same here with Windows Sandbox not starting with (0.800705B4).
Windows Sandbox is turned on in "turn Windows features on & off."
Sandbox opened and worked normally previously but I am unsure if I tested this after update KB5070311. But it definitly does not work after KB5072033.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(28.799999999999997, 91%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJ%3C/text%3E%3C/svg%3E)
JM 65 Reputation points2025-12-12T15:36:55.9266667+00:00 I have the exact same issue, and going to Windows Store just says Windows Sandbox is installed (there is no update pending for it)
Win 11 Build 26100.7462
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(92.8, 71%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDG%3C/text%3E%3C/svg%3E)
daniel grandjean 0 Reputation points2025-12-15T10:32:37.82+00:00 Not yet install KB5072033 and already not working.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(105.60000000000001, 98%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EKH%3C/text%3E%3C/svg%3E)
Krzysztof Huryn 30 Reputation points2025-12-19T09:31:58.7133333+00:00 Exactly the same issue here, since a week or so ago.
Windows 11 Pro 25H2 (OS Build 2600.7462).
Tried all the obvious steps including removing/re-adding the Sandbox feature.
Tried starting Sandbox with both standard settings and using my own .wsb with the <vGPU>Disable</vGPU> added. None of the methods work.
When activating Sandox, generation of the temp files in c:\ProgramData\Microsoft\Windows\Containers\ContainerStorages\ takes some minutes while the folder grows to just below 2 GB, then the (0x800705B4) error appears. -
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(256, 21%, 34%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EM%3C/text%3E%3C/svg%3E)
micTronic 0 Reputation points2025-12-29T11:52:56.12+00:00 See the issue also reported here:
https://github.com/microsoft/Windows-Sandbox/issues/101 -
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(233.6, 15%, 32%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EB%3C/text%3E%3C/svg%3E)
Bijan 0 Reputation points2026-02-11T07:54:58.2966667+00:00 I noticed this problem in January. Tried updating to build 26200.7628 and reinstalling the sandbox. However, the issue still persists with a few minutes of loading—then the sandbox crashes with 0x800705B4.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(166.4, 53%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EC%3C/text%3E%3C/svg%3E)
CharlyArg 0 Reputation points2026-05-10T20:04:56.6166667+00:00 Chiming in here as I have 22600.8246 and still having issues to start Sandbox in Windows 11. Oddly enough I found out that if I start it just as soon as I login, it will work; thus: application. In my case it was Moto's Smart Connect application (it connects to your smartphone). But worth it to check the ones open.
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29 answers
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(140.8, 40%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ES%3C/text%3E%3C/svg%3E)
SaturnLive 30 Reputation points2026-01-14T19:12:14.4566667+00:00 Since I have the problem of Windows Sandbox not starting and timing out, Windows Subsystem for Android also won't start.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(227.2, 6%, 32%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJJ%3C/text%3E%3C/svg%3E)
J JUIN 5 Reputation points2026-01-14T23:51:12.2466667+00:00 i've exactlly the same problem...
WSL and WSA won't work.
I've the lastest version of Win11, sandbox...
I can use Hyper-V with some VM like Debian, Win11... but i can't use Sandbox, or any Android App with WSA !!!
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SaturnLive 30 Reputation points
2026-01-14T10:44:28.2833333+00:00 Windows 11 25H2 26200.7623, still getting the error: Failed to initialize Windows Sandbox. Timeout. The operation failed. (0x800705B4).
Windows Sandbox hasn't been working for over a month, I even did an in-place upgrade and disabled and re-enabled Windows features several times but it doesn't work!!! -
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(220.8, 37%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESP%3C/text%3E%3C/svg%3E)
Stéphane Barrois 5 Reputation points2026-01-02T21:32:22.3133333+00:00 There is an open issue on Microsoft sandbox gitlab : https://github.com/microsoft/Windows-Sandbox/issues/101
Even if reinstall / repair seems to work for some people after some reboot it goes down again.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(172.8, 80%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERG%3C/text%3E%3C/svg%3E)
Rainer Goldbach 0 Reputation points2026-01-04T16:48:25.48+00:00 I have one laptop and one desktop computer. Both are running Windows 11 25H2 Build 26200.7462. The desktop meets the requirements for Windows 11, but the laptop does not. I had to install Windows 11 on the laptop using Rufus. I'm experiencing the same problems with the sandbox on the desktop, but the sandbox runs flawlessly on the laptop. Perhaps this information will help identify the problem.
(I used Google translate)
Regards ergo
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Francisco Montilla 31,170 Reputation points Independent Advisor2025-12-04T21:19:31.0433333+00:00 Hello,
Your symptom matches a known change in Windows 11 where, starting with version 24H2, the in-box Windows Sandbox hands off to a newer Windows Sandbox app delivered through Microsoft Store. If the Store cannot be reached or the update is still pending, launch can sit at the logo and then time out with
0x800705B4.Do this to get it working again.
Open Microsoft Store, go to Library, select Get updates, and let the Windows Sandbox app update install completely. If you do not see it in Library, search Microsoft Store for Windows Sandbox and choose Update or Install. Keep the Store open until it finishes, then launch Windows Sandbox again. If your network or policy blocks Store access, connect to a network that allows Microsoft Store and repeat the same steps.
If that does not resolve it, tell me and I will guide you through the next step.
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JM 65 Reputation points
2025-12-12T15:40:02.9866667+00:00 that doesnt work for me, i have the same issue - Win 11 Build 26100.7462
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(179.20000000000002, 6%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EZJ%3C/text%3E%3C/svg%3E)
Zatko Josef 1 Reputation point2025-12-12T16:24:02.7733333+00:00 My os 26200.7462 timeout 0x800705B4 too
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Eric Garnier 6 Reputation points
2025-12-14T23:28:51.93+00:00 The store say that it is installed. I can't find an option to remove it and re-install, or to upgrade it.
Where should I search ?
Eric -
Michael Higham 265 Reputation points
2025-12-15T16:47:56.8933333+00:00 You can't uninstall Windows Sandbox from Settings > System > System components. Also, you can't search for Windows Sandbox on the Microsoft Store app. To reinstall Windows Sandbox, turn the feature off from Windows Features in Control Panel and then turn it back on.
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Howard Rimmer 0 Reputation points2025-12-17T15:02:00.58+00:00 This does not work ! and I cannot find windows sandbox in the Store all it says is installed. also if I click open in the download list nothing.
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Howard Rimmer 0 Reputation points
2025-12-18T07:33:38.46+00:00 Tried this several times does not work.
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Krzysztof Huryn 30 Reputation points
2025-12-23T14:47:46.9766667+00:00 This "solution" is a wild goose chase, you can safely ignore it.
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