Root Cause
Microsoft Store showed "Something happened on our end" whenever an app download was started.
Store browsing worked normally, but downloads failed. Resetting and repairing the Store, re-registering Store packages, DISM, and SFC did not resolve the issue.
Investigation
Windows Event Viewer logs revealed that Microsoft Store was attempting to connect through a local proxy:
Failed to connect ... with proxy 127.0.0.1:10801
The configured proxy was no longer running, causing Store download requests to fail even though the Store interface itself remained functional.
The following commands confirmed the stale proxy configuration:
netsh winhttp show proxy
and
reg query "HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v ProxyServer
Both pointed to:
127.0.0.1:10801
while no process was actually listening on that port.
Resolution
Remove the invalid proxy configuration:
Open PowerShell or Command Prompt as Administrator.
Run:
netsh winhttp reset proxy
Disable the user-level proxy if necessary:
reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v ProxyEnable /t REG_DWORD /d 0 /f
Reboot Windows.
After reboot, verify:
netsh winhttp show proxy
Expected result:
Direct access (no proxy server)
Microsoft Store downloads started working immediately after removing the stale proxy configuration.
Notes
The issue appeared after a Windows update and was related to a VPN/proxy application that had previously configured the local proxy. The VPN tunnel itself continued to work, but the old proxy entry remained in Windows and prevented Microsoft Store downloads.