Had to use a translator... I can't speak german.

I hope you can read english.

Lots of people has problems installing the USB firmware. Which version of Windows (or Mac) are you using?

Please follow these instructions carefully:

1) Uninstall ALL drivers from Line 6 from your computer. Do it with the USB cable unplugged from your HD300

2) Turn off your computer (to clean up RAM memory, very important if it's Windows XP), then turn it on again

3) Download the Drivers:http://line6.com/software/

4) Install the drivers (please, keep the USB unplugged!!! Don't plug it!)

5) Almost at the end of the installation, the software will ask you to plug it. IMPORTANT: at the END of the installation

6) Read carefully: Turn OFF (power off) your POD. Plug the cable on a different USB port on your computer (don't use the USB you tried 20 times earlier. Use another one for Microsoft Windows litterally install a new driver). Plug it with the POD Turned Off.

Note: It's dumb but a usb driver installed for a USB port #1, won't work on USB #2 for example. So if you have removed the USB drivers, even if Windows hasn't deleted the driver for any reason, using a different USB port may help you.

7) Check: Computer USB plugged? POD USB plugged? Turn the POD On

8) Wait to check if the unit will be recognized by your computer (Windows 7 will let you know in about 10-30 seconds with a message nearby your clock)

Post your results for us to know what happened.

If something fails agian, please tell us which OS (operational system) you're using.

Gruß