Users may want to install Windows 7 64-bit on an Optiplex 790 or 990 with the Basic Input/Output System (BIOS) Unified Extensible Firmware Interface (UEFI) setting enabled. Here are some important items to note and a guide to install Windows 7 64-bit.
A User with a large install base of 5130 systems, and a mix of some other systems, reported experiencing random disconnects. The User operates a Radius server and is utilizing Aruba APs. The disconnects being experienced were random on systems with Windows 8.