I don't suspect you used your USB mouse during boot. Legacy USB support varies by motherboard. It's very important during boot or BIOS operation. Make sure it's enabled. It should be with other USB settings in the BIOS.
Windows USB support is completely different but if the problems didn't start at wildly different times I'd suspect they're related.
Doesn't sound like you're drawing too much power.
Anything on using another keyboard or one of those (usually green) ps2 adapters?
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There are a vast number of people who are uninformed and heavily propagandized, but fundamentally decent. The propaganda that inundates them is effective when unchallenged, but much of it goes only skin deep. If they can be brought to raise questions and apply their decent instincts and basic intelligence, many people quickly escape the confines of the doctrinal system and are willing to do something to help others who are really suffering and oppressed." -Manufacturing Consent: Noam Chomsky and the Media, p. 195
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