To remove a wrong driver in windows

Was unable to connect a neighbor's Nook Color as a mass storage drive to a windows computer. Turned out the ClockworkMod universal ADB drivers installed earlier have a priority and won't let the usbstor.sys (the mass storage) to be selected a the primary device driver. Uninstalling the driver for the device in the Device Manager did not help, it appeared again after the device was unpluged and then plugged again.
Knowing the vendor and product IDs (for the Nook Color they are VID_2080&PID_0002), I found the ClockWork's oem##.inf file in the %SystemRoot%\inf folder.
Where ## is a number of the .inf file where the device VID and PID were mentioned.
Tried to delete that oem##.inf and then reboot the PC, did not help.
But what did help, is Window's pnputil utility.
Execute the following command as administrator and then even no need to reboot:
pnputil -d oem##.inf

Also, there is an useful utility to maintain the currently and previously connected USB devices.

Cisco VPN client issue

Windows 8.1 with Bing, came with a netbook computer.
Need to make work the Cisco VPN client which gives the following error on a connect attempt:

Secure VPN Connection terminated locally by the Client, Reason: 440 Driver Failure

Tried this solution to install Citrix DNE. Did not help.

The event viewer shows that the driver signature can not be verified.
Desperatly did the following to make it work:

1. Turned off the BitLocker. Well, why I need a secured notebook which I can not use?
2. Disabled UEFI's Secured Boot. 
3. Executed the following commands:
   bcdedit -set loadoptions DISABLE_INTEGRITY_CHECKS
   bcdedit -set TESTSIGNING ON
4. Reinstalled the Cisco VPN client.

Works now!

Windows Device Manger extension

To see all old forgotten drivers in windows Device Manager (devmgmt.msc), set the following environment variable prior to run:

set devmgr_show_nonpresent_devices=1

then run devmgmt.msc and select "Show hidden devices" in the menu.


Useful site http://www.nirsoft.net/, in particular it has an utility to view USB drivers and devices.