A disk read error occurred Press Ctrl+Alt+Del to restart

Step 1: Shut down your PC completely.
Step 2: Turn on the Power button.
Step 3: As soon as you turn it on start hitting the F8 key on your keyboard until you get to a black screen called "Windows Advanced option". (If you don't get to that screen but you end up reaching the Blue/Black screen than that means you have delayed in hitting the F8 key. start again from step 1.)
Step 4: As soon as you reach "Windows Advanced option" use your down arrow keys to choose an option called "Last know good configuration".
Step 5: Select that and HIT ENTER

if this fails then try repairing it from recovery console.

• Insert the OS CD and boot from CD.
• During Startup, select Recovery Console from the startup options menu.
• When you are prompted, type the Administrator password.
• Type the Command chkdsk /r