Troubleshoot:acer aspire 5742-6838 has run slow from the moment i unboxed it Error

acer aspire 5742-6838 has run slow from the moment i unboxed it

i have an Acer Aspire 5742-6838 that i purchased about 2 years ago.
 it has run ridiculously slow from the moment i took it out of the box.
 I needed it for work so i just dealt with it since i couldn't afford to be without a computer.
 I only use the
computer to run Quickbooks for my business.
 Just about every time i open any application, it takes a good 30 seconds to multiple minutes before the page appears and then it reads "not responding" on the top of the window for another minute or so.
 It is especially
bad when i have more than one application open (rarely more than 2).
 After i have been using 1 application for a few minutes it seems to speed up but instantly slows down again if i change applications.
 Here are my computer specs:

Intel Core i5-460M,
15.6" HD LED LCD screen, 
Intel HD Graphics, 
4 GB DDR3 Memory (upgraded to 8 GB in hopes of speeding up the computer...failed)
640 GB HDD
Running Windows 7 Home Premium

I have tried different computer speed-up tools and cleaners as well as completely reinstalling the operating system.
 I have also gone through the installed programs and deleted everything i don't need to clear up space.
 I should have taken it to a warranty
center while it was still under warranty but i didn't, now I'll have to foot the bill myself.
 Any help would be appreciated.

Keys to the Problem acer aspire 5742-6838 has run slow from the moment i unboxed it

Download SmartPCFixer to Fix It (Free)

Check Windows System Requirements

This error can be due to some configuration requirements for you system. If your PC hardware is not up to par, then make sure you upgrade where necessary before continuing:

Microsoft Windows Requirements :

  • 1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor
  • 16 GB available hard disk space (32-bit) or 20 GB (64-bit)

Recommended Method to Fix the Problem: acer aspire 5742-6838 has run slow from the moment i unboxed it:

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2. After the scan is done, you can see the errors and problems need to be fixed. Click Fix All.

3. When the Fixing part is finished, your computer has been speeded up and the errors have been removed

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