Hi,
The error code 0x80070003 in Windows Sandbox usually indicates that the system cannot find the specified path or files needed to start the Sandbox. Here are some steps you can take to resolve this issue:
Ensure that your system meets the requirements for Windows Sandbox:
Windows 10 Pro or Enterprise, build 18305 or later.
AMD64 architecture.
Virtualization capabilities enabled in BIOS.
At least 4GB of RAM (8GB recommended).
At least 1GB of free disk space (SSD recommended).
At least 2 CPU cores (4 cores with hyperthreading recommended).
Ensure that virtualization on the machine is enabled.
Go to Control Panel > Programs > Turn Windows features on or off.
Ensure Windows Sandbox, Hyper-V, and Virtual Machine Platform are checked.
You can also open PowerShell as administrator and run the following command
Enable-WindowsOptionalFeature -FeatureName "Containers-DisposableClientVM" -All -Online
Open Command Prompt as an administrator and run System File Checker for scanand repair corrupted system files:
sfc /scannow
If SFC finds issues it can't fix, run the Deployment Imaging Service and Management Tool (DISM):
DISM /Online /Cleanup-Image /RestoreHealth
Ensure your system is up to date. Go to Settings > Update & Security > Windows Update and check for updates. Install any pending updates and restart your computer.