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Windows 7: USB devices Not recognized selectively

15 Apr 2011   #11
Commodore Pet

Windows 7 Home Premium 64 bit SP1

Can you please post a picture of device manager with the universal serial bus controllers section open.

My System SpecsSystem Spec
15 Apr 2011   #12

Windows 7 Ultimate 32bit

YAY I FIXED IT!!!!!!!!!

I was thinking the PSU might be the culprit. I replaced my OEM PSU (350) with and Antec Earthwatts 500 PSU.

I couldnt believe it; I put back my OEM psu and everything started working fine. All USB devices were recognized.

Thank you all for your help.
My System SpecsSystem Spec
16 Apr 2011   #13


That is great news Phil. Glad you managed to get it sorted.

My System SpecsSystem Spec

16 Apr 2011   #14

WIN7 Ultimate 64bit

Quote   Quote: Originally Posted by phil136 View Post
I have become very frustrated with this problem.

I have scoured the forums and have tried numerous things; unplugging power, uninstalling drivers, taking out MB battery, resetting CMOS, etc. All with no luck.

I am glad you fixed your problem in the end - the last resort would have been motherboard failure.


An educated guess and years of experience suggests you somehow left a power source connected to your motherboard which did not allow the usb motherboard chip to be wiped!

(probably a powered usb lead left plugged in when fiddling with cmos battery?)
My System SpecsSystem Spec

 USB devices Not recognized selectively

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