One important item in my life is my Acer notebook running windows7.l bought it five years ago at a decent price.This black thin notebook with rounded adges is c

One important item in my life is my Acer notebook running windows7.l bought it five years ago at a decent price.This black thin notebook with rounded adges is compact enough to carry in my backpack. ..............(1),it helps me complete all my work.l use the laptop............ (2)to type document,design web pages,and record sound............(3)saving my do cument,l also store my pictures and song in the laptop,.......(4),it does not perform as well as it did because it crashed a year ago,Hence,the performance is getting slow. ......(5),it often downloads unwanted programs when it us connected to the internet and l don't know how to stop this.