Windows 8 Running very slow.

Hello,
I have a desktop about 3 months old with windows 8 operating system. After a while it runs very slow.


Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 8, 64 bit
Processor: Intel(R) Core(TM) i3-3220 CPU @ 3.30GHz, Intel64 Family 6 Model 58 Stepping 9
Processor Count: 4
RAM: 6015 Mb
Graphics Card: Intel(R) HD Graphics, -1984 Mb
Hard Drives: C: Total - 945998 MB, Free - 855030 MB;
Motherboard: Dell Inc., 0XR1GT
Antivirus: Kaspersky Internet Security, Updated and Enabled