The OS is fine. Of course almost any pice of software out has its share of leaks and bugs and glitches. But its not the OS in this is the way it is configured in that particular machine. I can leave my PC running all the time and its still fine. I once left it running for 2 weeks until a power outage. Upon reboot it ran just as fast as it did when it got shut down. The comparison was only a 2-3 minute stretch.