docs: Remove outdated Windows NT 4.0 references from performance monitoring tools

- Remove references to Windows NT 4.0 and Windows Server 2003 from System Monitor description
- Update to current supported Windows versions per SQL Server system requirements
- Update ms.date to current date
- Add ai-usage tag per style guide requirements

Fixes customer feedback in UUF #321115 about outdated OS version mentions

Author: MikeRayMSFT

docs/relational-databases/performance/performance-monitoring-and-tuning-tools.md

@@ -3,10 +3,11 @@ title: "Performance Monitoring and Tuning Tools"
 description: Learn about SQL Server monitoring and tuning tools and how to choose the right one depending on the type of monitoring and the events to monitor.
 author: MikeRayMSFT
 ms.author: mikeray
-ms.date: 09/02/2025
+ms.date: 01/26/2026
 ms.service: sql
 ms.subservice: performance
 ms.topic: concept-article
+ai-usage: ai-assisted
 helpviewer_keywords:
   - "tools [SQL Server], monitoring performance"
   - "monitoring server performance [SQL Server], tools"
@@ -34,7 +35,7 @@ Following are the [!INCLUDE [ssNoVersion](../../includes/ssnoversion-md.md)] mon
 | [Extended Events overview](../extended-events/extended-events.md) | Extended Events is a lightweight performance monitoring system that uses very few performance resources. Extended Events provides three graphical user interfaces (New Session Wizard, New Session and the XE Profiler) to create, modify, display, and analyze your session data. |
 | [Execution Related Dynamic Management Views and Functions](../system-dynamic-management-views/execution-related-dynamic-management-views-and-functions-transact-sql.md) | Execution related DMVs enable you to check execution related information. |
 | [Live Query Statistics](live-query-statistics.md) | Displays real-time statistics about query execution steps. Because this data is available while the query is executing, these execution statistics are extremely useful for debugging query performance issues. |
-| [Monitor Resource Usage (Performance Monitor)](../performance-monitor/monitor-resource-usage-system-monitor.md) | System Monitor primarily tracks resource usage, such as the number of buffer manager page requests in use, enabling you to monitor server performance and activity using predefined objects and counters or user-defined counters to monitor events. System Monitor (Performance Monitor in Microsoft Windows NT 4.0) collects counts and rates rather than data about the events (for example, memory usage, number of active transactions, number of blocked locks, or CPU activity). You can set thresholds on specific counters to generate alerts that notify operators.<br /><br />System Monitor works on Microsoft Windows Server and Windows operating systems. It can monitor (remotely or locally) an instance of [!INCLUDE [ssNoVersion](../../includes/ssnoversion-md.md)] on Windows NT 4.0 or later.<br /><br />The key difference between [!INCLUDE [ssSqlProfiler](../../includes/sssqlprofiler-md.md)] and System Monitor is that [!INCLUDE [ssSqlProfiler](../../includes/sssqlprofiler-md.md)] monitors Database Engine events, whereas System Monitor monitors resource usage associated with server processes. |
+| [Monitor Resource Usage (Performance Monitor)](../performance-monitor/monitor-resource-usage-system-monitor.md) | System Monitor primarily tracks resource usage, such as the number of buffer manager page requests in use, enabling you to monitor server performance and activity using predefined objects and counters or user-defined counters to monitor events. System Monitor collects counts and rates rather than data about the events (for example, memory usage, number of active transactions, number of blocked locks, or CPU activity). You can set thresholds on specific counters to generate alerts that notify operators.<br /><br />System Monitor works on Windows Server and Windows operating systems. It can monitor (remotely or locally) an instance of [!INCLUDE [ssNoVersion](../../includes/ssnoversion-md.md)] on supported Windows versions.<br /><br />The key difference between [!INCLUDE [ssSqlProfiler](../../includes/sssqlprofiler-md.md)] and System Monitor is that [!INCLUDE [ssSqlProfiler](../../includes/sssqlprofiler-md.md)] monitors Database Engine events, whereas System Monitor monitors resource usage associated with server processes. |
 | [Open Activity Monitor in SQL Server Management Studio (SSMS)](../performance-monitor/open-activity-monitor-sql-server-management-studio.md) | The Activity Monitor in [!INCLUDE [ssManStudioFull](../../includes/ssmanstudiofull-md.md)] is useful for ad hoc views of current activity and graphically displays information about:<br /><br />- Processes running on an instance of [!INCLUDE [ssNoVersion](../../includes/ssnoversion-md.md)]<br />- Blocked processes<br />- Locks<br />- User activity |
 | [Performance Dashboard](performance-dashboard.md) | The Performance Dashboard in [!INCLUDE [ssManStudioFull](../../includes/ssmanstudiofull-md.md)] helps to quickly identify whether there's any current performance bottleneck in [!INCLUDE [ssNoVersion](../../includes/ssnoversion-md.md)]. |
 | [Upgrade databases using the Query Tuning Assistant](upgrade-dbcompat-using-qta.md) | The Query Tuning Assistant (QTA) feature will guide users through the recommended workflow to keep performance stability during upgrades to newer [!INCLUDE [ssNoVersion](../../includes/ssnoversion-md.md)] versions, as documented in the section *Keep performance stability during the upgrade to newer SQL Server* of [Query Store Usage Scenarios](../../relational-databases/performance/query-store-usage-scenarios.md#CEUpgrade). |