@@ -24,7 +24,7 @@ jobs:
         os: ["ubuntu-latest"]
         include:
           - python-version: "3.14"
-            os: windows-latest
+            os: windows-2022
           - python-version: "3.14"
             os: macos-15-intel
     steps:
 
@@ -32,7 +32,7 @@ def main() -> None:
     tests = workflows["run-tests-action.yaml"]
     for version in ("3.11", "3.12", "3.13", "3.14"):
         require(version in tests, f"Python {version} is missing from the test matrix.")
-    for runner in ("ubuntu-latest", "windows-latest", "macos-15-intel"):
+    for runner in ("ubuntu-latest", "windows-2022", "macos-15-intel"):
         require(runner in tests, f"{runner} is missing from the test matrix.")
     require("pull_request:" in tests and "workflow_dispatch:" in tests, "The test workflow lacks required triggers.")
     require("contents: read" in tests, "The test workflow must default to read-only contents permission.")
 
@@ -5,9 +5,12 @@ Status: **In progress pending remote validation**.
 ## CI decisions
 
 - The established Linux matrix remains the compatibility gate for Python
-  3.11–3.14. Python 3.14 also runs on `windows-latest` and the supported Intel
+  3.11–3.14. Python 3.14 also runs on `windows-2022` and the supported Intel
   `macos-15-intel` runner, giving every advertised operating-system family a
   current execution check without multiplying the complete version matrix.
+- The Windows lane is pinned to windows-2022: two runs on the current
+  windows-latest Windows Server 2025 image crashed micromamba with access
+  violation 3221225477 while linking the solved environment, before pytest.
 - Test jobs use explicit Coveralls flags of
   `run-<python-version>-<runner>`. The finalisation job waits for the complete
   matrix and does not carry forward nonexistent or missing jobs.