After the driver installation for Windows 7 via the Internet, the device has also been recognized properly. At first glance, there are no conflicts. But when I tried to access the site for online banking my bank (where the card reader is initializing) it always came to browser crashes (or freeze the window with the message "Not Responding") - despite ins, both on Firefox or the IE 8!
After that, I was a bit puzzled ... Did the device then installed on my notebook (upgrading from Vista to Windows 7), same drivers, etc.) and since then everything has worked smoothly. So it depends depending on hardware and installation components, whether the smart card reader works just fine.
Meanwhile, I use a Chipdrive Micro Pro for my desktop PC (also because initially the same problems under Windows 7, but thanks to the excellent customer support from SCM (fixPCSC.exe file by mail) runs Jett everything perfectly!