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I'm hitting a brick wall trying to figure out exactly what the problem I am having is & how to go about fixing it. I'm hoping someone here at OC can point me in the right direction. Every now & then I've been getting a windows popup error message which says:
Microsoft mouse & keyboard detection driver (usb) has exceeded the power limits of it's hub ports.
For assistance in solving this problem, click this message.
then about 5 - 10 seconds later the pc shuts off (as in power cuts out).

I am using a RF wireless keyboard & mouse which stop working, so when the error occurs I am not able to click the message nor do I have enough time to plug in a wired mouse before it shuts down.
It seems to be random. This happened at least 5 times. The pc will not turn back on afterwards. I have to unplug all usb cables & PSU cable, unplug everything from surge protector, then let it sit for a bit, then it will turn back on. I didn't think it was turning back on today. The other times it will start the POST, then reset, then boot up to "windows did not shut down properly blah blah......". This time it started to boot, restarted, then went to CMOS checksum error.

I've been digging on google for quite some time but still haven't found anything. I've found plenty on the" Power Surge on Hub Port" error, but nothing where the pc loses power. Most "solutions" just disable the error messages. Others make reference to bad mobo, bad usb cord, bad device, software related, bad PSU, & sleep/hibernation mode error.
Searching for the CMOS checksum error, I found many possible reasons including dying battery. Last entry this morning in windows event viewer before it shut off is
Log Name: System
Source: Service Control Manager
Date: 5/15/2013 6:05:21 AM
Event ID: 7036
Task Category: None
Level: Information
Keywords: Classic
User: N/A
Computer: Spanky-PC
The UPnP Device Host service entered the running state.
Event Xml:




UPnP Device Host

I don't even know where to begin to diagnose this problem. With a 4 month old daughter to attend to, it makes troubleshooting that much more complicated.biggrin.gif

Now, I have had another power related issue which I do not know if it's connected. I have 8gb G.Skill Ripjaws X installed. I had it set in bios to use XMP profile. It works great like that for months & then I'll get a random error message at boot:
The system has experienced boot failures because of overclocking or changes in voltage

I never did get the chance to pull & check the ram.

I was considering updating BIOS as a possible solution, but I am at the most up to date official bios F5 and I am very hesitant on installing beta U1c (c'mon, where's our stable UEFI we've been waiting for!) I am running WIN 7 x64. My pc is plugged into a surge protector & my PSU has some internal protection as well. I even tried searching on how I can test the PSU in case thats the problem but that can get pretty involved. If need be, I'll have to buy a PSU tester, but I would like to hold off on that until I tried a few other steps first.

Sorry for the long post. I'm trying to give as much info as possible. Just let me know if there's anything i'm missing. Any help is appreciated. thumb.gif