Open task manager and look under the processes tab and note which processes that are using the most amount of CPU and post back with name of the process that is causing the excess CPU usage so other more experienced members can properly respond.
Computer type PC/Desktop System Manufacturer/Model Number My own abomination OS Windows 7 Professional x 64 CPU Intel i7 2600K @ 3.40 GHz Motherboard ASUS Sabertooth P67 Memory Corsair Vengeance 16GB DDR3 1600MHz CL8 Dual Channel Kit Graphics Card Asus ENGTX570 GeForce GTX 570 1280MB GDDR5 PCI-E w/ Dual DVI Sound Card Onboard Realtek or Nvidia High Definition Audio (HDMI) Monitor(s) Displays Sharp 42" LCD TV ( 5 HDMI and VGA inputs ) Screen Resolution 1366 X 768
Keyboard Logitech Wireless Illuminated Keyboard K800 Mouse Logitech M515 Wireless Couch Mouse PSU Corsair TX 850W Power Supply w/ 140mm Fan Case Cooler Master HAF 932 High Air Flow Full Tower Chassis Cooling Zalman CNPS10X FLEX CPU Cooler & 2 Thermalright Silent Fans Hard Drives Intel SSD 330 Series SATA III Solid State Drive, 120GB Internet Speed 100 Mbps Antivirus Kapersky Internet Security 2013 Browser (Primary) Firefox 19.0.2, Chrome & IE 10 Other Info LG Super Multi Blue Internal Blu-ray Disk Rewriter - BH10LS30