Conductivity lost equipment from UBS

I run Windows Vista on a Dell E520 computer.  At random times and for no apparent reason the computer loses conductivity with one or several UBS devices: printer, keyboard or external hard drive.  In most cases, the conductivity is restored after I cut the power supply and do a restart.  I'm tired of crawling in the dark under my desk.  Comments will be appreciated, Don.

Hello

That looks a lot like a problem of material so best to check with a real computer store (not
leeks and glances at a BestBuy or other BigBox store) or system manufacturer support and perhaps
forums for known problems (if any).

-------------------------------------

References to Vista also apply to Windows 7.

Follow these steps to remove corruption and missing/damaged file system repair or replacement.

Start - type in the search box - find command top - RIGHT CLICK – RUN AS ADMIN

sfc/scannow

How to fix the system files of Windows 7 with the System File Checker
http://www.SevenForums.com/tutorials/1538-SFC-SCANNOW-Command-System-File-Checker.html

Then run checkdisk (chkdsk).

How to run check disk in Windows 7
http://www.SevenForums.com/tutorials/433-disk-check.html

-----------------------------------------------

Then lets refresh the USB stack

Control Panel - Device Manager - click anywhere in the area of white/white - then VIEW - Show Disabled
Devices - look around (with the exception of USB controllers) for your camera (can have zero or more only)
(a) and right on it - click UNINSTALL.

Control Panel - right CLICK on EVERYTHING - Serial USB controllers - Device Manager and UNINSTALL
all except the category itself - REBOOT - it refreshes the drive and battery USB

This KB shows XP how to and methods of Vista and Windows 7 are the same
http://support.Microsoft.com/kb/310575

This is a utility to help you, but do 1 above.

USBDeview is a small utility that lists all USB devices currently connected to your computer, as
Although all USB devices that you previously used. Run Options and check the 1st three choices to
see if one is there.

http://www.NirSoft.NET/utils/usb_devices_view.html

You must remove all instances of the devices and restart.

----------------------------------------------

If necessary try these two:

Tips for solving problems of USB devices - and a Mr Fixit
http://windowshelp.Microsoft.com/Windows/en-us/help/c39bd203-f729-47a4-8351-83291e13c8a81033.mspx#EGB

Hardware devices not detected or not working - Mr. Fixit
http://support.Microsoft.com/GP/hardware_device_problems

=======================================

If so maybe a repair installation may help.

How to do a repair installation to repair Windows 7
http://www.SevenForums.com/tutorials/3413-repair-install.html

How to start on the System Recovery Options in Windows 7
http://www.SevenForums.com/tutorials/668-system-recovery-options.html

What are the system recovery options in Windows 7?
http://Windows.Microsoft.com/en-us/Windows7/what-are-the-system-recovery-options-in-Windows-7

Installation and reinstallation of Windows 7 (upgrade - store programs and data or New Installation)
which removes the)
http://Windows.Microsoft.com/en-us/Windows7/installing-and-reinstalling-Windows-7

I hope this helps.

Rob Brown - MS MVP - Windows Desktop Experience: Bike - Mark Twain said it right.

Tags: Windows

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