Go to this page and read the review of Acer Aspire 5755 laptop.
https://mouthshut.com/review/Acer-Aspire-AS5755-review-upotpslurr/1#1027564
90 % of people using acer laptops are facing same issue and still company is denying its responsibility.
Worst hardware you can buy is with Acer. And best luring ads you can see is also with them this way they are cheating its customers.
They are everywhere when they see that there Mouthshut rating going down the make posts to make it better.