I'm new at this "Posting," but I just have to jump in. The last answer to your question was correct, but they didn't tell you exactly what to do. There is nothing wrong with your computer. You just have to change some settings on it to make it stop going into hybernation.
The easiest way is to put your cursor over any empty (no folders, etc.) space on your desktop and "RIGHT click" your mouse. A helpful little window will appear (called a Context Menu)with a list of options you can choose by scrolling down with your cursor and do a normal left click on any of them.
In this case, you want to select and click on "Properties" which is usually at the very bottom. Do a normal left click on that and it will bring up a very special and important mini-window (be patient, it may take a second or two,) called "Display Properties" with a series of filing type "TABS," across the top, labeled "Themes," "Desktop," "Screen Saver...," etc.
You want to click on the tab labeled "Screen Saver and yes, another mini-window will appear on top of the others.
Near the bottom and to the right of that small window, is a button labeled "Power."
Click (normal left click)on that Power button. For hopefully, the last time, another mini-window will appear on top of all the rest. You will know you're in the right place because there is an explanatory note on that page that says, "To adjust monitor power settings and save energy...yada, yada, yada. From there, you can change settings for 1.) the Monitor, 2.)the Hard disks, and lastly, 3.)System standby.
I prefer to select "NEVER turn off" to everything by playing with the tiny arrows next to each selection (just the THREE OPTIONS in the middle of the window...ignore everything else...unless you're curious to play with stuff, but I don't recomend poking around right now.) These three settings take precedent (main control) over everything else, so there is no need to do anything more...even playing with the "Hibernate" tab to turn it on or off makes little to no difference. You're almost done.
Then "OK" your way back out of all the mini-windows. Do a reboot (Or "Restart" to turn your computer off and back on) to set your selections permanently on your computer, and it will never go to sleep or turn off by itself again...of course, only if you selected "Never" for all those settings. You may make different decisions.
I have let my computers remain on, up, and active for the past 3-4 years with no problems other than a higher electric bill. It's entirely up to you to decide how you want your machine to behave. You can always go back and rechange everything to your heart's desire.
You'll get the hang of it.
Experiment with the differences between "left clicking" and "right clicking" lots of things and it will open up a new world for you. Good luck and I hope this helps someone.
daletek@MSN.com