First, open Windows Update. It is located under Control Panel > System and Security > Windows Update. Click the “Change Settings” link in the sidebar.
You need to install SHA-2 and SSU updates first as Microsoft disabled SHA-1 Windows Update for anything from Win2K to Windows 7 (without SHA-2 updates).
Do a clean install of Windows 7 Ultimate SP1 64-bit, then run the 817 MB size Simplix UpdatePack7R2 23.7.12 pack, then install the necessary device drivers.