Get accurate Windows version info from registry instead of os.release() (#295842)

Used Windows registry to retrieve Windows release and build numbers.
Added passing User-Agent header to update service.
Updated installer launch env to ignore compat mode.

src/vs/base/node/windowsVersion.ts

@@ -0,0 +1,113 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as os from 'os';
+import { isWindows } from '../common/platform.js';
+
+let versionInfo: { release: string; buildNumber: number } | undefined;
+
+/**
+ * Initializes the Windows version cache by reading from the registry.
+ *
+ * On Windows 8.1+, the `os.release()` function may return incorrect version numbers
+ * due to the deprecated GetVersionEx API returning compatibility-shimmed values
+ * when the application doesn't have a proper manifest. Reading from the registry
+ * gives us the real version.
+ *
+ * See: https://github.com/microsoft/vscode/issues/197444
+ */
+export async function initWindowsVersionInfo() {
+	if (versionInfo) {
+		return;
+	}
+
+	if (!isWindows) {
+		versionInfo = { release: os.release(), buildNumber: 0 };
+		return;
+	}
+
+	let buildNumber: number | undefined;
+	let release: string | undefined;
+	try {
+		const Registry = await import('@vscode/windows-registry');
+		const versionKey = 'SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion';
+
+		const build = Registry.GetStringRegKey('HKEY_LOCAL_MACHINE', versionKey, 'CurrentBuild');
+		if (build !== undefined) {
+			buildNumber = parseInt(build, 10);
+			if (isNaN(buildNumber)) {
+				buildNumber = undefined;
+			}
+		}
+
+		const major = Registry.GetDWORDRegKey('HKEY_LOCAL_MACHINE', versionKey, 'CurrentMajorVersionNumber');
+		const minor = Registry.GetDWORDRegKey('HKEY_LOCAL_MACHINE', versionKey, 'CurrentMinorVersionNumber');
+		if (major !== undefined && minor !== undefined && build !== undefined) {
+			release = `${major}.${minor}.${build}`;
+		}
+	} catch {
+		// ignore
+	} finally {
+		versionInfo = {
+			release: release || os.release(),
+			buildNumber: buildNumber || getWindowsBuildNumberFromOsRelease()
+		};
+	}
+}
+
+/**
+ * Gets Windows version information from the registry.
+ * @returns The Windows version in Major.Minor.Build format (e.g., "10.0.19041")
+ */
+export async function getWindowsRelease(): Promise<string> {
+	if (!versionInfo) {
+		await initWindowsVersionInfo();
+	}
+	return versionInfo!.release;
+}
+
+/**
+ * Gets the Windows build number from the registry.
+ * @returns The Windows build number (e.g., 19041 for Windows 10 2004)
+ */
+export async function getWindowsBuildNumberAsync(): Promise<number> {
+	if (!versionInfo) {
+		await initWindowsVersionInfo();
+	}
+	return versionInfo!.buildNumber;
+}
+
+/**
+ * Synchronous version of getWindowsBuildNumberAsync().
+ * @returns The Windows build number (e.g., 19041 for Windows 10 2004)
+ */
+export function getWindowsBuildNumberSync(): number {
+	if (versionInfo) {
+		return versionInfo.buildNumber;
+	} else {
+		return isWindows ? getWindowsBuildNumberFromOsRelease() : 0;
+	}
+}
+
+/**
+ * Gets the cached Windows release string synchronously.
+ * Falls back to os.release() if the cache hasn't been initialized yet.
+ * @returns The Windows version in Major.Minor.Build format (e.g., "10.0.19041")
+ */
+export function getWindowsReleaseSync(): string {
+	return versionInfo?.release ?? os.release();
+}
+
+/**
+ * Parses the Windows build number from os.release().
+ * This is used as a fallback when registry reading is not available.
+ */
+function getWindowsBuildNumberFromOsRelease(): number {
+	const osVersion = (/(\d+)\.(\d+)\.(\d+)/g).exec(os.release());
+	if (osVersion && osVersion.length === 4) {
+		return parseInt(osVersion[3], 10);
+	}
+	return 0;
+}