I've it for around 2 years and never before a week or so back has it lagged and kept crashing.

It will take round 10 mins to turn on and 15 to turn off, compared to before which on avergae was around 3 mins.

Any programs including itunes, gogle chrome, or my documents folders keep crashing.

I have tried defragmentation and many update and clearing out space but nothing seems to help.