Thanks for joining the Desktop Board community.
If the computer current BIOS version was 0048, you had to go to version 0099 before updating to any later BIOS version; otherwise, you will encounter issues afterwards.
See BIOS release notes for more information: http://downloadmirror.intel.com/23393/eng/BE_0120_ReleaseNotes.pdf
Yes, i am aware of this. Thats what i did, updated to version 48, then 99 and then up to 120.
Bios update utility wont let update to 120 anyways if i havent updated to 99.
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The board BIOS cannot be reverted to 0048 once you updated to a later version. You would need to use USB port or USB hub to have more ports available for your computer.
Im not trying to revert to 48.
Problem is that PS2 KB not functoning correctly after bios update. (120)