I run two computers - a main computer with Windows 8.1 Pro - and a second "test box" that I have Windows 10 preview installed on. I have an almost identical load of software on it - and there are a few issues....90-95% of the time, it is really great. It is that 5-10% of the time that you have to do extra things to make it work....and report it to Microsoft....and hope they fix it....