|Sounds like it may be hardware problem if it won't start in safe mode either.|
The two most likely suspects are the RAM modules (one or more of them may be faulty) or the hard drive may be faulty.
To test the RAM modules, download Memtest86 ISO CD-image from here:
Now create a CD from that ISO file and boot your laptop from it to test the RAM.
You can use IMGBurn to create the CD from the ISO. Get IMGBurn here:
If the RAM modules pass the test, test the hard drive with Seagate SeaTools for DOS from here (click "Downloads"): http://www.seagate.com/support/down...
Again, this is an ISO CD-image file from which you can create a CD using the same IMGBurn utility. Boot your laptop from the CD you've made and the SeaTools testing program will open. Select your laptop's hard drive and test it using the "Long" or "Extended" test.
If all that sounds way too complicated for you, ask a knowledgeable friend to do it for you.
If neither the RAM nor the hard drive are faulty and you need to post for further help, please mention that the RAM & hard drive have already been tested and are okay.