Ever since I run Windows 7 the LCore driver program of my G300 gaming mouse has runtime errors. They appear every time I start my PC or when I manually try to start LCore.exe. LCore is the software that enables me to create and save button profiles in the mouse. I've been in contact with Logitech about this error for a month now and their latest suggestion is that I either reinstall Windows 7 (don't think so!) or send both mice (they sent a second one to check whether the first one was broken) back for a refund. This means they've run out of options and I have to turn to you for advice. What can I do to solve this issue?