Two things to try first:-
It might be that the loaded USB driver has been corrupted and it will not be overwritten by a correct driver until it has been un-installed.
Please try this. Plug in the scope and then go to Windows Device Manager.("Control Panel", "System" and then click on the Hardware Tab). If there is an "Unknown USB device" there or a "PicoScope 4000 series" with a yellow warning triangle under USB controllers, left click on it once to highlight and then right click to bring up a list from which select "Uninstall". Once that is done, unplug the scope and then plug it back in again. The Windows "New Hardware Found Wizard" will run. Follow the on-screen instructions and, if the wizard asks to connect to Windows Update, select 'No' and allow Windows to automatically detect and configure your scope after which the scope should show up in device manager again but as a "PicoScope 4000 series Oscilloscope". If you get that, your PicoScope6 software should now work.
Failing that, when installing PicoScope6 on a PC you also need to install "Microsoft Dot Net 2.0 framework" which is a program provided by Microsoft. We supply this on our CD of PicoScope6.
If you install PicoScope6 from our website and the PC is still connected to the internet, the installer will automatically connect to the Microsoft site to download .net 2.0 for you.
You can download it as a file to a CD or memory stick to load it onto a PC without internet access. If you go to the following link, which is on the Microsoft site, you can get a free download which will install .net 2.0 framework for you:-http://www.microsoft.com/downloads/deta ... laylang=en
You only need to load it once, future upgrades of PicoScope6 will work with the original "Dot Net" program you installed.
Please contact again on Help-desk if you still have firstname.lastname@example.org