I am trying to reboot my acer laptop

Step 1:
Laptop computers can be wonderful devices, except when the need to troubleshoot arises. Acer laptops are no different. A quick way to fix many problems with an Acer laptop running Windows is to reset it to factory settings. Resetting your Acer laptop to factory settings can eliminate slow operation, registry problems, virus problems and spyware issues. What's more, a factory reset of your laptop may reduce the need for a full reinstallation of Windows.

Back up all necessary data to an external device such as a disk, flash drive or hard drive Make sure all programs are closed and shut down your Acer laptop. Detach any external hardware such as an external hard drive or printer. Press the Power button to boot your Acer laptop. Press "Alt-F10" on your keyboard when the Acer screen appears at the start of the boot-up process. Wait a moment while Windows loads the reset files. Select "Restore System from factory default" in the Acer eRecovery Management window. Click "Next" on the next screen to continue. Click "Next" on the following destination information window. This will pop up a notice telling you that resetting your Acer laptop will erase all data and restore the laptop to its original settings and configuration. Click "OK" in the notice window to proceed with resetting your Acer laptop. Wait while your Acer laptop is reset to factory settings.

clean your fan

Sounds like your system needs a anti-virus issue. Restart the system hitting the F8 key as it begins to start until it the system gives you option of how to start the system scroll down to "LAST GOOD CONFIGURATION THAT WORKED" click on that. The system should start as normal, once it has go to your anti-virus and run that - then go and do a system restore to a point before it began having the freezing problem. This usually comes from movie sites with pop ups do not click on pop up only go to sites you initiate.

You turn it off ...then back on to reboot.

click the start button - select turn off computer

press F8 immedialty after switcing on...try to load the option "Load last good system that worked b.....etc etc" else...
shut down restart press F8 select Safe Mode...
if it starts in Safe mode and u can get to Desktop...
get Tuneup Utiltiy from my website
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clean ur registry and try to start in normal mode...

This is generally caused by bad blocks in the Master Boot Record(Table). The drive itself is probably not salvagable. You'll need a reputable reapir person to slave your drive to another system to get the data off.

Good Luck

Try booting the system to Safe mode.

To boot to safe mode:
Restart the computer. As soon as the BIOS has finished loading, keep tapping on F8 key on your keyboard. When the Windows Options menu appears select the "Safe mode" then press Enter.

Once you managed to boot to Safe mode, change the computer startup and recovery settings by right-clicking "My Computer" then select Properties. Select Advanced tab. Under Startup and Recovery, click Settings. Uncheck the box for "Automatically restart" under System Failure.

Reboot again normally, see if it will reboot again by itself. If you managed to make the system boot normally, proceed to Events Viewer to find out what is the caused.

If the system failed to boot normally after doing the above, you might want to boot the system to "Last known good configuration"

reload the operating system

only thing you can do sit restore the operating system, unfortunately sometimes this happens with updates like this, and the only solution is to restore it.

1. Start laptop
2. When the laptops Logo page closes, start to press F8
3. You should get a Windows Start screen
4. If you get a Windows Logo page (the kind you normally get when Windows loads, then reset it and start again.
5. On the Windows Start page select "Last known good configuration" and press enter twice

Hope that solves it for you =)