I wish to update the Microcode Update Device driver (update.sys) on Windows 2000 family operating systems. The "update.sys" file contains microcode that is uploaded to Intel processors on performance of function of the update.sys driver. The newest update.sys file I have found comes with Windows XP Service Pack 3 (may be acquired http://www.microsoft.com/downloads/info.as...SP3-x86-ENU.exe ). I have attached images to this thread: One showing "Microcode Update Device" in device manager, and the other a search of the Windows XP Service Pack 3 files for "update.sys" contained within the files. For the search for the text "update.sys" of the Windows XP Service Pack 3 files, I had decompressed the compressed files to the search's root directory ("xp_sp3") and extracted the cabbed files to other directories. No cabbed files had references to update.sys. The only reference to update.sys from the expanded (decompressed) files was for the "wuapi.dl_" file. The file "update.sy_" is the compressed update.sys file and is located in the i386 directory. I have the driver file from Windows XP Service Pack 3, update.sys, containing the newer microcode updates, but I do not have the a Setup Information file (*.inf file) for the installation of the driver. I request assistance for this matter to prepare a driver update. Any help in this matter is appreciated. EDIT: I would attach the "update.sys" file to this thread, but it appears the file is larger than the limitation by the forum (even in compressed form).