Hello everyone,
I have had this pc in my signature in service since ~2012 and it has worked great, while running overclocked it’s whole life. But recently I have started to have USB issues. 
 
I started to notice it upon arrival of my Valve Index, after using it for a few days I noticed my usb keyboard on the top left 2.0 usb port would randomly turn on its lights when the pc was off.
 
I then started having the keyboard (corsair K70) drop and re-connect on the win10 login screen, I thought it may be the keyboard so I tested with a different keyboard (same issue) and then verified that the original keyboard worked fine by using it for a few hours on my laptop.
 
So once the drops started getting longer, and finally just dropping keyboard all together on the login screen. I then switched to a different 2.0 port, only to realize that the other 2.0 ports aren’t working for the keyboard.
It also dropped and reconnected keyboard in BIOS while it was plugged into the top left 2.0 port 

So here the weirdness starts, the mouse (razer naga) works fine, and in any 2.0 or 3.0 port. The keyboard works fine, but only in a 3.0 port (so far).
I have not changed any settings or installed any other software other than the VR drivers/HL Alyx and windows updates as this machine is only used for gaming not even browsing.
 
So for now I have resigned to having the keyboard and vr occupying my 3.0 ports, while my mouse is only thing on 2.0. No other HDD or devices on USB at all.
I have checked to make sure all drivers/firmware etc are up to date on everything.
 
I know these boards had USB issues anyway back in the day when 3.0 was new but I only had a few times of a USB not working with a device, overall it has been great.
 
This board is technically still under the EVGA 10 year warranty, but I’m not sure it would help or matter much since it is so old.
I am wondering if it’s worth doing a complete reinstall of windows but I am thinking it is hardware based as it exhibits the issue in BIOS as well.
 
Any other tips or input will be greatly appreciated. I may need justification to pull trigger on a new build!
 
Thank you! 
 

No problem, thank you!

Man I keep breaking stuff left and right, filter does not like me haha. Why is it requiring approval for every post here?
Ty again!

Ok, just read your OP
 
What other items are installed into a USB ports besides Mouse & KB ?
 
Maybe it is the KB or its cord or plug is damaged ? 
 
Unplug All Case USB ports as a test ... one could have an issue ... Not sure if you use them
 
  I'd get a cheap KB or spare & test the USB posts again
 
testing the KB on a known good PC ... though if the KB is the root cause (has some sort of short) there is some Risk to the other PC
 
Driver or chipset needs to be reloaded ? 
 
Windows update issue ?
 
What OS are you using ?
 
Capture your BIOS settings ( I like the camera in my phone), load default settings & reboot --> then edit your BIOS to your settings
 
How Old is the CMOS battery ?
 
 
 

In the Windows Power Options -> Advanced power settings -> USB settings you could try disabling "USB selective suspend" and hope it matters, otherwise, it sounds like the USB controller on the mobo is probably failing or that one of your USB devices is causing the problem..You could also try reseating the CPU.

I did make sure the selective suspend in windows was disabled too or any power management for USB controllers in general that I could find I disabled it.
 
And I have a feeling since she's so old, and the controller was iffy at best even when new, that it may be on the way out. 
I have def got my moneys worth, at least let me 100% HL:Alyx and mess around in VR which is pretty good for a machine of this age.
 
I am going to try a new CMOS battery and then if that does not fix it, I will call EVGA support and see what the deal is if you warranty a board this old. Do they give you a % of the value I assume?
 
It may be time to for a new EVGA build on Z490!
 
Thanks everyone for the input.

Robob
 
It may be time to for a new EVGA build on Z490!

 

Thank you for the update ...
 
yes the USB controller or a solder joint could be on the way out --> more current = more heat - you mention some "fancy KB" failing sooner
 
test the PSU ?
 
Buy a add in USB card - to make this last as you plan & collect parts for your new Z490 build
 
 
 

So to update on this board it has turned out that a MS Update is causing an issue with the HMD drivers even on a fresh install of win10.
 
The specific issue I traced it down in the event log is:
"ETW USB tracing" failed to start with the following error: 0xC0000022”
 
others with oculus VR and others with Valve Index have had similar issues with USB dropping and BSODs seen here:(https://forums.oculusvr.com/community/discussion/52859/ocrservicelauncher-is-causing-all-my-usb-devices-to-disconnect/p1)
 
I have been going through Regedit and Component Manager fixing the permission issues as They pop up. I have seen others with DCom permission issues doing this too but I have been unable to find a 100% fix that isn’t randomly undone.

An update must have changed how something got handled with the cursor/keyboard binding to a monitor. On startup the HMD must look like an option until it times out with no active session.
 
I fixed the permission issues in the log but I still get this error on startup randomly, so maybe a security update changes permissions (not sure).


So for now I have taken to just unplugging the HMD when done until MS/SteamVR devs figure out what is going on.


Thanks again to all for the help!
 
I figured I would put this up here for info in case others run into this issue. Others seem to think it is 1080ti related but I am not certain.