Completely shutting off and you have to restart it? Or is it crashing when launching apps?
Does the battery have a full charge and if it indicates that the battery is fully charged maybe there is a problem with the charger (assuming you use the power adapter and plug into a all socket - don't plug into your computer) and you could try another power adapter and/or the cable?
You can try resetting the iPad and closing all apps and restarting.
Reset the iPad by holding down on the sleep and home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons.
Go to the home screen first by tapping the home button. Quit/close open apps by double tapping the home button and the task bar will appear with all of you recent/open apps displayed at the bottom. Tap and hold down on any app icon until it begins to wiggle. Tap the minus (-) sign in the upper left corner to close the apps. Restart the iPad. Restart the iPad by holding down on the sleep button until the red slider appears and then slide to shut off. To power up hold the sleep button until the Apple logo appears and let go of the button.
If the behavior continues, you may want to consider restoring the device.
Try closing all apps completely and then do a reset : from the home screen (i.e. not with any app 'open' on-screen) double-click the home button to bring up the taskbar, then press and hold any of the apps on the taskbar for a couple of seconds or so until they start shaking, then press the '-' in the top left of each app to close them, and touch any part of the screen above the taskbar so as to stop the shaking and close the taskbar.
To reset : press and hold both the sleep and home buttons for about 10 to 15 seconds (ignore the red slider), after which the Apple logo should appear - you won't lose any content, it's the iPad equivalent of a reboot.
Then re-try what you were doing. If it still doesn't work then you could try restoring back to your last backup, and after that it's possibly a case of restoring back to factory defaults and then adding your apps and content back onto the iPad.
When you backup the iPad the contents of your apps should be part of that backup, and should therefore be put back on the iPad when you restore to it - a list of what is included in a backup and how to do backups/restores is on this page : http://support.apple.com/kb/HT4079 (a backup excludes synced music/films/tv shows/photos as they should already be on your computer). But to be sure I would always make copiesb of any important content before restoring just in case something goes wrong - so I'd either copy the documents off via iTunes or email them to myself (or whatever transfer methods the apps support), and that goes for other apps as well (nothing should go wrong, but it's best to be safe).
thanks for the reply, that's what I tried to do exactly and I restored my device. I have IOS 4.3.5, I talked to apple support and they told me that this maybe a bug in the IOS, they told me if restoring doesn't work, setup a repair. But i'll wait till IOS 5 comes out and install and hopefully this fixes the problem
I don't know if this will make you feel any better or safer about restoring, but I have restored from my backup on two occasions. Both times with great success. All of my Pages documents were intact on the iPad after the restore. I was having a problem with file sharing using Pages until I finally installed the update to iTunes over this past weekend. I can say now my iPad is running as well as it was when it was first activated - and everything is working as it should be. I did delete some apps that I thought were causing some problems (frequent browser crashes) and that helped as well.
Bottom line, restoring and updating can cure a lot of issues with your device - as far as I am concerned.