You may have to boot from either the Windows 7 installation DVD to access repair options or from some other "live" disk like Ubuntu, Hiren's BootCD, Ultimate Boot CD, etc. If you don't have a Windows 7 install DVD you can obtain a free, legal copy from Digital River (an official Microsoft download site.) You'll need to download the ISO file of the version of Windows 7 that came with your computer, save it to desktop, then burn it to disk. Official Windows 7 SP1 ISO from Digital River « My Digital Life Home | Ubuntu Hiren's BootCD 15.2 - All in one Bootable CD » www.hiren.info Ultimate Boot CD - Overview
You might also want to go through these troubleshooting guides prepared by one of the Forum experts. Troubleshooting Windows 7 Failure to Boot Troubleshooting Windows 7 Failure to Boot
You could also try using that Windows 7 install disk to do a repair install which should preserve your user accounts, data, programs, system drivers, etc. Repair Install
All of the above suggestions are primarily related to software issues (damaged or corrupt files, malware, etc.) But if your laptop has suffered a hardware failure (CPU, motherboard, hard drive, etc) nothing will work until the bad hardware is replaced.