Can't get past windows 7 startup repair

So earlier on, my laptop wouldn't respond so I shut it down. When I went to turn it off again it came to a screen saying "Windows failed to start up, a recent hardware or software change might be the cause". There is two options: Start Windows Normally, or Launch Start up repair, which is recommended. When I click on Start Windows Normally, it loads for about 20 minutes then restarts itself and lands back at the windows failed to start up page. When I click on Launch Startup Repair, it says "Loading windows files" and loads for a few minutes before showing the windows loading symbol, and then it goes to a black page with a cursor pointer on it. I can move the cursor about, but no matter how long I wait, it doesn't do anything. I really need this laptop, and I am only 14 so please don't confuse me, just try to help. There is no F8 option ever when I start up my laptop, even when it was working. I am using windows seven. Help please!

Run chkdsk from the Recovery Console

• Boot your Windows 7 installation DVD
• When you see "Press any key to boot from CD or DVD", press Enter
• At the "Language" screen hold the "Shift" key and press the F10 key to open a Command Window
• Type chkdsk /r and press Enter.

Let this run to completion undisturbed, can take an hour or more depending on the size of your hard drive.

If you don't have a install DVD, you can download a legal copy here: Download Windows 7 ISO (Official 32-bit and 64-bit Direct Download Links) « My Digital Life

Make sure you get the same version you have installed: 32 or 64 bit; Starter, Home Premium, Pro or Ultimate.

See if that fixes the problem.