I have a HP G62-340US Notebook. Recently last month (December 2013) whenever I leave my laptop on for extended periods of time with no activity in goes into sleep mode (black screen) and when woken up (moving the mouse etc.) it takes me to the account log in page. An intermediate stage it goes through is I'll move the mouse, the keyboard with light up (wifi button has a light dial to indicate its status, caps lock lights up, and the power key lights up). It takes about 5 to 10 seconds while "loading" before I get to the actual log in page. However, recently it stopped doing that. When I move the mouse to take it out of sleep mode, the keys light and the computer freezes will trying to get to the log in page. It is a black screen before it goes to the default log in page (sky blue background). The computer at this point is completely unresponsive. I've tried powering down manually by holding the power key, then trying to turn it on, but it doesn't get beyond that screen. The only remedy seems to be to unplug the charger and wait for the laptop to die (takes 90 minutes). At that point, I can turn it back on, and it will load to the login screen without freezing. This has happened 4 times since december. As you can assume, its a big inconvenience because a lot of my work is on my laptop and to wait for it to die and then turn on is time consuming. Moreover alot of important files are on my computer which I can't afford to lose. Any opinions on how to fix this? Or perhaps treatment strategies (shutdown evertime after I use it, etc)? Thanks!