How to comletely remove Bluetooth drivers?

[NashaRussia]

Hi. Please tell me how to comletely remove all Bluetooth drivers? I can't install drivers (any of Widcomm versions). It writes the following:
http://funkyimg.com/u/22987error.png
I've tried execute all exe files.
I've uninstall threads of software by the following manual:

Find all instances in the registry of:

btwusb
95C7A0A0-3094-11D7-A202-00508B9D7D5A
widcomm

For each, figure out what is the appropriate tree of registry keys and delete it.

It will be necessary to use C:\WINNT\system32\regedt32.exe to add full control permission to some registry trees.

In C:\[WINDOWS|WINNT]\inf, find and remove the BTWUSB inf file(s).
Find them by searching for files containing "WIDCOMM"
The file(s) should be named oem*.inf

In C:\[WINDOWS|WINNT]\system32, delete btw_ci.dll

In C:\[WINDOWS|WINNT]\system32\drivers, delete btwusb.sys and frmupgr.sys

Then reboot

but it won't help to install WIDCOMM drivers.
Earlier i use WIDCOMM 5.0.1.801 with my dongle Broadcom 2045 Bluetooth 2.0 USB-UHE Device . Then i've decide to upgrade drivers, and after that they won't work.