How to Fix Computer That Will Not Boot up

1. THIS IS HOW IT WORKS :Some older computers and ALL Toshiba laptops come with a system restore disk. Simply place the disk in the CD tray and hit ENTER, if that does not work, power the computer off and on with the disk in the tray, wait for the special system recovery screen to appear, (be patient)
2. If you were not issued with a disk, then the following is for you.
Each computer manufacturer has a special key you have to hit WHEN YOU POWER ON the computer.
HP and Compaq desktops/towers/laptops F11, E Machines and Gateway F11,
Sony PC/laptop F11, IBM and Lenovo towers and laptops all use F11 function key for system recovery.
Dell laptop use Ctr + F11
Acer and TRAVELMATE Laptop Alt + F10
Toshiba laptop F12
3. Here is the trick- power the computer off, and then power it back on and start tapping the appropriate key eg F11 until a screen pops up saying 'DO YOU WANT TO DO A SYSTEM RESTORE' OR 'WELCOME TO SYSTEM RECOVERY MANAGER' Once you see something appear on the screen, stop tapping and just follow the instructions. Some of the older computers may ask you for the restore disks so have those ready. Most newer computers do not need restore discs. The whole system restore could take 2 or 3 hours. When done, reboot your computer and it should be all new and speedy again.