User account needs to be set to login as a service
OR
KB5066835 is installed
It has come to our attention that Windows 11, October 2025 Cumulative Update (KB5066835) can cause localhost connections to fail. This might affect Hardware Station (HWST) and LS Central connections if hosted locally.
While Microsoft is investigating the underlying cause for
this, they have provided two workarounds:
1. Workaround
#1:
1.
In the
registry keys, navigate to:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\HTTP\Parameters
2.
Under the
Parameters folder, right-click in the right-hand pane and select New > DWORD
(32-bit) Value.
3.
Name the value
EnableHttp2Tls and set its data to 0 (zero).
4.
Repeat the
process to add another value named EnableHttp2Cleartext and set its data to 0.
