One thing I did notice in your posting of system specs is this. Are you using broadband connection or a dial up modem. From the looks of it a broadband connection. Right click on My Computer>Properites>Hardware>Device Manager. Click on Network Adapters and disable any device you not using.. Close and reboot see if this changes anything.. Also look to see what the Name of the Hd your using is and go to the manufacturing wedsite and download the diagnostic tool.. Do a complete scan to see if it brings up any error messages..
MB: Asus Sabertooth 990FX R2.0/Processor: AMD FX 6200 3.8GHZ Black Edition /video Card:Asus GTX 550TI/Ram:Corsair XMS DDR3 8Gig 2x4Gig PC1600/HD:1x150GBWestern Digital Raptor 1x2TB 64Mb Cache Segate Beracuda 7200 SATA /Monitor:ASUS VS247 H-P 23.6"/Keyboard :Logitech K800/ Mouse: Logitech Wireless G700 /Speakers: Logitech G51/Printer/Fax/Scanner:Brother MFC-685CW