whats wrong with my macbook pro?

Question

(info on mac before detailed question)
Mac OS X Version 10.7.5
processor 2.9Ghz intel Core i7
memory 8GB 1600MHz DDR3
startup disk macintosh HD
so back to the question. I bought my mac online last summer almost exactly 1 year ago. Ive never had any problems with it until the past few days. When ever i open up a new window online or program etc i get a huge lag spike which makes the program/window freeze for 5-10 seconds. When it finishes loading it becomes runnable again but with random lag spikes here and there. im scared some hardwere/softwere is broken with my laptop. i have dropped it before but this was about 1 month ago from not to great of a hight. other than that i dont know what else to say about it. is there a website/program that scans my laptop or finds out the problem? thanks for reading and thanks even more if you answer it
~troubled mac user

Answer 1

Update your software: Make sure OS X itself, and any apps you use regularly, are up to date, because a software update may have fixed a crash-producing bug. Choose Software Update from the Apple menu to update Apple software and anything downloaded from the Mac App Store; for anything else, use the app’s built-in software update feature or download the latest version.



Disconnect peripherals: If you attached any new devices recently—especially USB devices—try disconnecting them. Restart and see if the problem recurs. If not, the device may be faulty or, more likely, it may require updated software or firmware. Contact the device’s manufacturer for assistance.



Repair your disk: Disk errors can lead to all sorts of problems, crashes included. Try using OS X Recovery and using Disk Utility’s Repair Disk feature to look for and fix common disk errors.



Run Apple Hardware Test: Apple Hardware Test is a special utility you can run to test your Mac’s logic board, RAM, graphics board, and other components for errors that could lead to crashes and worse. Apple’s support site has complete instructions for using this tool.



Try a safe boot: To disable certain software that loads at startup and to run cleanup processes that may resolve random gremlins in your system, try a safe boot: Restart your Mac, and, immediately after you hear the startup sound, press and hold the Shift key until the gray Apple logo appears on the screen. If the problem goes away, restart again normally and try again.

Answer 2

Disk utility - verify and repair permissions (search for this in google if in doubt)

Answer 3

Sounds like battery shortage

Answer 4

Its under warrantee most surely. Take it and ask Apple Store.