So both your Win 7 installation and System recovery are producing "blue screen" when trying to boot. It means you got a hardware problem and most likely it is your RAM. Best way to test RAM is to swap it with a known good RAM . If you don't have one available from another working laptop, check if your laptop came with 2 RAM sticks. If yes, plug only one stick at a time.
If you don't have more than one RAM stick, run built in self test option in the Laptop to test RAm and HDD.
To start System Diagnostics:
1. Turn on or restart the computer. While the “Press the ESC key for Startup Menu” message is
displayed in the lower-left corner of the screen, press esc. When the Startup Menu is displayed,
2. Click the diagnostic test you want to run, and then follow the on-screen instructions.
Run Start-up test , Run-in test , Hard disk test , and Memory test
Edited by Anshad Edavana, 07 May 2013 - 10:48 AM.