Microsoft has released two new patches for Windows XP

Windows XP Patch: Windows Management Instrumentation Cannot Register Permanent Event Consumer with Dynamic Classes

This update addresses the Windows Management Instrumentation Cannot Register Permanent Event Consumer with Dynamic Class issue in Windows XP, and is discussed in Microsoft Knowledge Base (KB) Article Q319322. Download now to allow registration of permanent consumers.

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Windows XP Patch: WMI AccessCheck Receives Local Administrator's SID