After computer boots/starts I need to unplug my USB mouse and/or keyboard to get them to work.

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I'd estimate 50% of the time I start my computer I had to unplug and replug in my mouse or keyboard or both.  Once in a while, at the Dell bios boot screen, before the windows loading screen happens, the dell bios loading white bar fills 90% of the way and the computer stalls there.  Not sure if the problems are related.

I have gotten a BSOD in the past as well, it had USB in the title of it... next time it happens I will write the whole thing down.

I tried Dell tech suport but they are a nightmare!
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Top Expert 2007

Commented:
If you are using a USB keyboard and mouse. Try using a PS2 keyboard and mouse. If this works then you may have a problem with your USB ports or one of the components plugged into those ports. Also unplug any other USB peripheral.

Author

Commented:
My computer does not have any PS2 ports.
Top Expert 2007

Commented:
What model of computer do you have.
Top Expert 2007

Commented:
And do you have any other peripherals that use the USB ports.

Author

Commented:
Its a Dell Dimension 9100... The only other thing plugged in is an 80 gig Kanguru Quicksilver external HD (it's not on usually, rarely use it)
Top Expert 2013
Commented:
try deleting ALL usb entries in device manager, and reboot and test.
you can also run sfc /scannow from the run box, or even a repair install :
http://www.michaelstevenstech.com/XPrepairinstall.htm      

and if it worked fine before, a system restore to an earlier date can help you out too. (look in system tools, under accessories)
Top Expert 2007
Commented:
When this problem occurs, check the diagnostic lights on the front panel. Which lights are lit when the problem occurs?
Also unplug the external USB hard drive.

Author

Commented:
I know you've heard this before, but I doubt it's a windows problem.  My computer is pretty mint as fart as virus/spyware/etc.  This has been a long time problem since I got the computer.

I will try an sfc though.  I don't have the Dell windows disc because they fail to give that to you anymore.

I will restart my computer untill the USB problem occurs and check the lights for you.   Could this be a hardware issue?
Top Expert 2013

Commented:
if you have an extra disk around, install windows on it and test; that way you're sure
It can be a hardware issue
You did try the other ports too ?

Author

Commented:
Ran chkdsk... Ran sfc... the problem with hte mouse and or keyboard still happens.  I tried all the ports, but now they are plugged into the front ports so I dont have to break my back plugging/unplugging them from the rear of the PC when I turn it on.
Top Expert 2013

Commented:
try running a ram test  :  use memtest86+ from :  www.memtest.org/      

Author

Commented:
You think it could be a RAM issue?  I'll try it and check back in later.
Top Expert 2007

Commented:
I see the computer has a multimedia bay with card reader ports . These would be considered  USB devices as well. You might try disableing these in device manager to see if the problem is stemming from them.

Author

Commented:
Will try that toooooo... Thanks.

Author

Commented:
Gentlemen and or Ladies... I finally got Dell tech support to change out the motherboard but the didn't get here yet.  Thanks for all your help.  Shall I split the points?
Top Expert 2007

Commented:
Sounds fine to me.

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