|"It works perfectly in Windows. I've been using it this way for close to a year, actually, and it has only become a problem now that I want to reinstall Windows. It says "press any key to start from DVD drive" and well... I can't."|
NOTE that if the bios detects no bootable hard drive partition (that has an operating system installed on it), you WILL NOT see "Press any key to boot from CD " or similar while booting. If the Boot Order or similar is set correctly such that CD drive or similar is before Hard drive or network drive or similar, the bootable operating system CD or DVD will start loading it's files automatically.
I tried disabling USB Legacy support in the bios of one of my computers, then attempting to boot it from a XP Home CD - that does not work when the keyboard is USB connected.
The default settings in older mboard bioses usually have USB Legacy devices or similar disabled; in newer bioses that's usually enabled by default.
If you have a desktop system with a fairly recent mboard, removing the mboard Cmos battery, then installing it again so that + is visible when it's installed, or moving the clear Cmos jumper on the mboard to the clear position, moving it back, will probably enable USB Legacy devices or similar in the bios.
However, you will get a Cmos Checksum Error or similar message when you boot after doing that, and you will need to set at least the current time and date in the bios, Save settings.
(If you can't enter the bios, usually setting the current time and date in the operating system automatically changes the time and date in the bios. Note that you may get error messages in the operating system that will go away when the time and date have been corrected. )
"If you can get your hands on a USB-to-PS/2 converter (usually a little green connector), you may be able to try using your USB KB as a PS/2 device (assuming the keyboard itself is still working). "
There is likely at least one thing wrong with that statement.
A simple gender adapter that you plug into the connector on the end of cord for a keyboard or mouse to convert it for use in a PS/2 port WILL NOT WORK unless the keyboard or the mouse is a "combo" model - designed and wired up to be used with both types of ports. If it IS a "combo" keyboard or mouse, it came with the simple gender adapter when new
A simple gender adapter for a "combo" keyboard, often colored purple, usually will NOT work with a "combo" mouse, and a simple gender adapter for a "combo" mouse, often colored green, usually will NOT work with a "combo" keyboard, because the necessary connections are not there within the adapter.
There are USB (type A male) to PS/2 (one or two DIN female) adapters that have circuits between the connectors that allow you to connect a PS/2 only keyboard or mouse via a USB port, but I don't think there is such a thing for the opposite situation - adapters that have circuits between the connectors that allow you to connect a USB (only) keyboard to a PS/2 port.