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== Hide the HI-SPEED USB Device Error Alert w/o Correcting ==Windows XP and Windows Server 2003 create a pop-up notice when a Hi-Speed USB 2.0 device is plugged into a USB port that does not support Hi-Speed. You may not have a high speed USB controller, or you may just wish to conceal the alert message without correcting the problem. Follow these steps in the Windows Device Manager: 1. In the Device Manager window, expand the Universal Serial Bus controllers node. Look for a host controller with the word "Universal" or "Open" in the title. If you find one, double-click it.2. On the Advanced tab of the Properties dialog box, check the Don't tell me about USB errors checkbox. :! Following this procedure will disable all USB notices, not just "HI-SPEED USB Device plugged into non-HI-SPEED port."== USB Connection Interruption and Instability ==The USB mouse operates correctly but other USB devices keep dropping in and out under Windows XP (the problem is also reported by Windows Vista users). One common suggestion is to try uninstalling all USB Root Hubs in Device manager and restarting. Users have reported this does not resolve the problem.The Windows Device Manager (devmgmt.msc) will not show drivers for USB devices that are not attached by default. You can change this behavior by executing the following commands at the Windows command shell. c:\set devmgr_show_nonpresent_devices=1Ref: http://support.microsoft.com/kb/315539You can get rid of drivers for USB devices that you no longer use. === Microsoft USB Instability Fix for Intel Chips ===Microsoft Technical Staff Fix: USB Flakey Connection. According to Microsoft there's a problem with the Intel USB chipsets going flakey.Step 1: Remove Hidden Devices# Open a Command Prompt.# Type "set DEVMGR_SHOW_DETAILS=1" (without quotation marks) and press Enter.# Type "set DEVMGR_SHOW_NONPRESENT_DEVICES=1" (without quotation marks) and Press Enter.# Type "start devmgmt.msc" (without quotation marks) and click press Enter.# Click View. Click Show hidden devices. # Click "+" to expand devices, Unknown devices and USB devices. # Are there any devices and unknown devices (including grayed out devices)? If so, please right click it and click Uninstall them.Step 2: Remove all oem*.inf files# Click start and click run then under the run line type in the command "cmd" (without the quotation marks)# In the command line, type in the following and press enter after each command: cd \windows\inf ren infcache.1 *.old ren oem*.inf *.old del C:\windows\setupapi.log exitStep 3: Removing all entries under HKEY_LOCAL_MACHINE/Enum/USB that start with VID using REGEDIT.Removing the VID entries from the registry will cause them to be redetected at restart.CAUTION: If you have a USB keyboard, mouse, scanners, and other things you know are working, do not remove the VID entry for these devices, otherwise, Windows may not restart correctly.# Click Start and click Run. Type regedit and click OK. The Registry Editor window will open. # Go to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Enum\USB. # Highlight and delete all the VID_.... entries for usb devices that you cannot identify. Remember not to delete the entries mentioned above.! Make a backup of the registry entries you are about to delete.You may not have permssion to delete keys, do the following.Permissions may be set allowing the deletion of the VID_ entries by following the steps below: ::a) Right-click the key to be deleted, and then click Permissions. The VID_... Permissions window will open. ::b) With Everyone highlighted in the Group or User name section, select Full Control in the Permissions section. ::c) Click Apply, and then click OK. : 5. Restart your computer.Step 4: Reconnect the USB device that was not previously working. Windows should automatically rerinstall the drivers.