Computer running so slowe

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: AMD A6-3420M APU with Radeon(tm) HD Graphics, AMD64 Family 18 Model 1 Stepping 0
Processor Count: 4
RAM: 5606 Mb
Graphics Card: AMD Radeon(TM) HD 6520G, 512 Mb
Hard Drives: C: Total - 476837 MB, Free - 405592 MB;
Motherboard: Acer, Aspire 5560
Antivirus: Microsoft Security Essentials, Updated and Enabled

computer has slowed down so much in the last week. Getting more picture place holder the X instead of a picture loading in facebook as well.
Ran Adwcleaner Report Below

AdwCleaner v3.100 - Report created 20/04/2014 at 00:06:04
# Updated 20/04/2014 by Xplode
# Operating System : Windows 7 Home Premium Service Pack 1 (64 bits)
# Username : Owner - OWNER-PC
# Running from : C:\Users\Owner\Desktop\adwcleaner.exe
# Option : Scan

***** [ Services ] *****


***** [ Files / Folders ] *****


***** [ Shortcuts ] *****


***** [ Registry ] *****


***** [ Browsers ] *****

-\\ Internet Explorer v9.0.8112.16496


-\\ Mozilla Firefox v

[ File : C:\Users\Owner\AppData\Roaming\Mozilla\Firefox\Profiles\856kxftg.default\pr efs.js ]


*************************

AdwCleaner[R3].txt - [4201 octets] - [19/04/2014 23:52:13]
AdwCleaner[R4].txt - [680 octets] - [20/04/2014 00:06:04]
AdwCleaner[S3].txt - [4126 octets] - [19/04/2014 23:53:33]

########## EOF - C:\AdwCleaner\AdwCleaner[R4].txt - [799 octets] ##########


Appreciate your help. Pam