Dell Dimension 4600 BIOS A12

Fixes:1. Fixed Quick Boot menu when no bootable drives are selected in SETUP. 2. Updated microcode for newer CPUs. 3. Eliminated possible hang on next boot when AC power is removed. 4. Fixed intermittent hang in resuming from Standby. 5. Improved keyboard test when booting from Hibernate. 6. Fixed possible hang after unplugging and re-plugging USB hubs. 7. Increased USB keyboard wait time to allow all USB devices being enumerated. 8. Added…
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