With some 200 posts and if you google it you find more discussions. This one is well covered.
"Power Surge on Hub Port"..... "A USB device has exceeded the power limits of its hub port. For assisatance in solving this problem, click this message."
Saw this perplexing problem for the first time on a client's PC... Thought I would see if there was anything out there before I started troubleshooting. PC has been on a burn in test for several days. Solution to this problem is easy TURN OFF System Standby & DISABLE Hibernation in Control Panel - Power Options -on Power Scheme Tab set System Standby to NEVER - click Apply Then change to Hibernate Tab and Uncheck Enable Hibernation
Problem was on a Sony Viao PCV-RS310 aka PCV-2222 that was fine prior to Factory Restore and no USB devices were attached..... Problem has NOT re-appeared since and I did NOT try to change ANY of the USB settings suggested in the threads I found. So try this first before you start turning off warnings and changing drivers or registry settings.