1 year and some months... i really think this is something with the system or updates...i found all the list with updates that i made on my mac maybe it would say something to you...:)
Date Name Version
9/5/12 Java for OS X 2012-005 1.0
9/9/12 Digital camera raw compatibility 3.14
9/912 Mac OS X update 10.7.4
9/9/12 Remote dekstop client update 3.6.0
9/9/12 Airport utility 6.1
9/9/12 Macbook Pro Efi Firmware update 2.7
9/9/12 Thunderbolt firmware update 1.0
10/4/12 iTunes 10.7
10/4/12 Mac. OS X update 10.7.5
10/4/12 Remote dekstop client update 3.6.1
10/4/12 Macbook Pro Efi Firmware update 2.7
10/7/12 Safari 6.0.1
10/15/12 GarageBandInstruments and apple lo.. 1.0
10/21/12 Java for OS X 2012-006 1.0
11/4/12 Safari 6.0.2
Also, hard disc has been changed because once i crashed my opened mac on the ground. It was changed at the late of August till OCtober mac was working perfectly. What is more, i have microsoft office a little illegal version i think i said everything there is nothing more the computer is almost new with the new hard disc and plenty of space...I clearly remmeber that after software update mac stopped working normally. I think it was after these updates 10/4/12 ...But im not 100% sure. I dont have warranty anymore and to bring it to the prof. service i guess would be my last hope.. What do you think i should do?
Thanks Tho!