laptop freezes

I have an Asus X550LD laptop with 8gb ram , graphics card and i 5 processor. When my laptop is moved, then one of the below mentioned things happen. My laptop freezes totally. It does not respond to any key and then I had to only hard reboot the computer. My laptop gets disconnected to the...

I purchased my Acer Aspire V3-771G-9875 (http://us.acer.com/ac/en/US/content/model/NX.M0SAA.001) in the end of September in preparation for my first year of University. The freezing first occurred a couple weeks after purchase, I was worried at the time, but simply hard reset the computer and...