Cant reboot - it started when the internet froze and i did ctrl atl delete and ended prosces for expoler, then computer froze so i used ctrl alt delete to restart computer, when computer restarted it stopped at blank screen asking to press f1 and or f2 but f1 wont do anything and f2 doesnt nothing either unless i press ctrl alt delete it restarts it self and i press f2 before it goes blank again. but in bios menu i dont know what to do

If you don't have a reboot disk, you can still reboot your computer. Here's how:
- Restart your computer.
- Press and hold the Ctrl+Alt+Delete keys at the same time.
- When the Windows Security screen appears, click Restart.
- Your computer will restart without a reboot disk.

A white computer screen can appear sometimes if your graphics card is bad . If the computer screen turns white as soon as you press the Power button that's a good sign that there something is wrong with the computers graphics card.
Try Pressing Ctrl + Alt + Delete.on the keyboard for your computer or try to reboot your computer too. You can fix the white screen issues here by simply using a keyboard shortcut. Try pressing Ctrl + Alt + Delete all at once then when the white screen shows up.

You did the right thing. It should clear up when you turn it back on. The system will reboot. Hopefully it was just a glitch that could be worked out by restarting. That is often the case.

A hard shutdown (unplugging or holding in the start button) is hard on the system and can shorten your computer's life, so don't turn it off abruptly unless you have no other choice.

Try Ctrl Alt Delete first and see if you can find the frozen process. Then "end program." that might unlock you and is safer for the system. Also, from Ctrl Alt Delete, you can shut down the computer.

USE ALT-F4 TOGETHER TO EXIT OUT OF ANYTHING THAT YOU ARE IN.

Windows system key combinations

• F1: Help
• CTRL+ESC: Open Start menu
• ALT+TAB: Switch between open programs
• ALT+F4: Quit program
• SHIFT+DELETE: Delete item permanently
• Windows Logo+L: Lock the computer (without using CTRL+ALT+DELETE)

Windows program key combinations

• CTRL+C: Copy
• CTRL+X: Cut
• CTRL+V: Paste
• CTRL+Z: Undo
• CTRL+B: Bold
• CTRL+U: Underline
• CTRL+I: Italic

Windows system key combinations

• F1: Help
• CTRL+ESC: Open Start menu
• ALT+TAB: Switch between open programs
• ALT+F4: Quit program
• SHIFT+DELETE: Delete item permanently
• Windows Logo+L: Lock the computer (without using CTRL+ALT+DELETE)

Windows program key combinations

• CTRL+C: Copy
• CTRL+X: Cut
• CTRL+V: Paste
• CTRL+Z: Undo
• CTRL+B: Bold
• CTRL+U: Underline
• CTRL+I: Italic

ALT + F4......to exit. if this not working then ALT+CTRL+DEL....then end task

Do a control-alt-delete and start the task manager. Choose the processes tab and end any Firefox processes you find. Once you terminate them all, Firefox will open for you.

open the task manager by pressing CTRL,ALT and DELETE at the same time and selecting task manager, click the applications tab and select IE8, then click on end process. This will stop the need to reboot.
I have had the exact same problem and now use firefox instead, faster and simpler to use. Plus there are so many addons that you can use for downloading and speeding things up.

As a standard reboot? Click start, then turn off computer, then reboot.

If it doesn't work like that hit CTRL ALT DELETE all at the same time and then Click shut down at the top and then Restart as the option.

If NTLDR is missing, you will need to do one of two things:

1) follow this link and follow instructions to create a NTLDR boot disc and get back up and running

or

2) boot to Windows CD and repair Windows installation

Hope this helps - remember to rate :)