>Sergey, I found this in the registry, you may be able to find the same on yours.
>I have Windows 2000 pro.
>
>HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Print\Printers\Acrobat PDFWriter\DsDriver
>driverVersion = 0x00000401
>
>I have PDF Writer 4.01 installed :-)
>HTH
>

It shows the same value on my PC but I've PDFWriter 5.0 installed. Thanks anyway.