Can not get any boot at all

try to set it back to factory.
press and hold the "Volume Up", "Home", and "Power" buttons.
Release the buttons when you see the recovery screen and the Samsung logo.
Use the volume buttons to navigate the menu and select "wipe data / factory reset". ...
On the next screen, press "Volume Up" to continue.

To boot into Safemode (win 8 and above), hold down the Shift key while pressing the restart button.

Then a screen will appear. Select "Troubleshoot" -> Change startup settings (Or something like that). Then use the number keys to select the startup option

Hi
First try pressing down the power button for up to 10 seconds or until the laptop powers down. Wait a couple of minutes and see if the computer reboots properly. If it does, fine, if not power the laptop down again and again wait a couple of minutes, power on and press F8 whilst it is booting to get a menu up which should say on one of the entries something like "revert to last known good settings" Highlight this option using the keyboard arrow keys (mouse won't usually work here) and pressing return.
This should set your computer back to before the update that is causing the problem.
Hope this is helpful, if so would you please register that with Fixya
Cheers

If the iPad has frozen on a screen press and hold both the lock and home buttons for about 30 seconds. This will hard reset the iPad and it should then boot normally.

Windows XP, right? Click on start, shutdown and then restart!

Is the laptop frozen? Hold down the power button for about 5-10 seconds until power shuts off. Just press the power on again to get it to start back up. Make sure you can NOT reset soft before cycling power on your laptop because you can lose/corrupt data during a cold boot.

Hope this helps,
Bill

where are you getting that error message, on the pc or the 3100

Has there been a power surge meanwhile? If so, try unplugging the power cord, press the power button, reconnect power and try booting. Sometimes works.

I just had the same issue. Press the reset button. After pressing the reset button, plug it into your USB port on your PC. You should see it come back to life and shouldn't have to re-intall the firmware.

Try putting the computer into safe mode by shutting down the computer. Turn the computer back on. At beginning of the boot process press and hold the f8 button and select safe mode from the menu.

When the safe mode is done booting up, try moving the mouse around. If it works, restart the the computer under normal Windows startup procedures.

you can try to run the batteries down or you can try to open it, disconnect the battery and connect it again, before closing it see if the unit was reseted.