Interested in virtualization technology in these days. Suddenly these 2 questions appear in my mind. Please answer them seriously. 1. I run it for let's say 7 days and turn the machine off then. The trial period should become 23 days at the time I turn it off. Will the trial period continues to decrease after turning off? Will the HASH of the VM machine file change afterwards? 2. I burn the whole Win7 VM machine folder on a DVD. Things on a DVD are supposed to be unchangeable (unless you rewrite them with a burn software). I run the machine from the DVD on another desktop with VMware. After the usage of virtual Win7 of 7 days, will the trial period still be "30 days left"? (or I can ask in another way: Setting the machine as "read only") If you answer Question 1 "Trial period won't continue to drop" and "Hash remains unchanged", so does this mean that we can use a trial OS FOREVER legally? (Because you can duplicate the VM machine file any times you like and use one by one until each 30+30*3 days end.) If you answer Question 2 "Trial period will still be 30 days left". However, during a 7-day continuous usage of the machine, will you see the trial period drops day by day from 30 to 29, 28... 23? If not, I doubt that whether the machine can make direct memory access.