Install Toppy Driver

A special driver (WinUSB) is needed to access a Topfield TF5800 or TF5810 from a windows pc (the driver that Microsoft automatically selects for you will not work).

The driver and instructions for it's use can be obtained from
(basically, one runs z4t.exe and follows the onscreen instructions about when to connect the toppy).

The same z4t.exe program can be used on pcs running the XP, Vista, Win7 or Win10 operating systems (both 32 and 64 bit)

Win10 Systems Only
By default, Win10 security does not allow "unsigned" drivers to be installed.
This means that extra steps are necessary before running z4t.

Warning:  BitLocker
My Dell pc uses a product called BitLocker. Basically, the data on the disk is encrypted so that it can't be read in another pc unless one knows the encryption key (8 six digit numbers). If your system uses BitLocker, you will need to manually type your disk's encryption key when the system reboots i.e. print it off before you start!  (see below on how to obtain codes).

Basically, one has to disable Driver Enforcement to install the driver on a Win10 system. To do this, proceed as follows:
  1. Make sure all "work in progress" files are saved (because the PC will be rebooted)
  2. It is a good idea to download the z4t.exe first and place it in an easy accessible location e.g. the download folder or as a shortcut on the desktop

  3. Type Settings in the "Type here to search" box on the task bar
  4. Click Update and Security
  5. Click Recovery
  6. Select Advanced Startup and click Restart Now
    (The PC will REBOOT at this point!)

  7. Select TroubleShoot
  8. Select Advanced Options   (no longer necessary)
  9. Select Startup Settings
  10. Click Restart
    The PC will reboot a second time

  11. If necessary, enter your BitLocker 24 digit number
  12. On the Startup Settings screen, press 7 or F7 to disable "driver signature enforcement"
    Note: the enforcement will only be disabled for the duration of the next boot i.e. if it doesn't work
    for some reason, you need to repeat all the above steps before running z4t.
    The pc will restart

  13. Run z4t

Running z4t
Note: On my Win10 desktop, I didn't need to "Run As Administrator"

When z4t is run, windows will tell you that the driver is unsigned (possibly not on XP systems)

z4t will tell you whether or not the installation was successful.

Obtaining your BitBlocker Code
To determine your BitBlocker code:-
  1. Right click the Start button and select "Windows PowerShell (Admin)"
  2. Type in the following command (note "manage-bde" is one word)
    manage-bde  -protectors  C:  -get