That doesn't sound normal. It sounds like you have ad-ware, which is similar to a virus, on your computer. Download, install, update, and run MalwareBytes Anti-Malware (MBAM). If you do have ad-ware or other malware, MBAM should do a good job of finding it.
System Manufacturer/Model Number Over Clockers Ultima Viper 2.80Ghz OS Windows 7 Ultimate 64 - OEM Service Pack 1 CPU Intel Core i7 930 2.80Ghz Bloomfield Socket LGA 1366 Motherboard Gigabyte GA-X58A-UD3R Intel X58 Socket 1366 DDR3 Memory Patriot Viper 6GB 3x2GB DDR3 PC3-1200C9 1600Mhz Tri Channel Graphics Card Asus ATI Radeon HD 5770 CuCore 1024MB GDDR5 PCI Express Sound Card Realtek ALC889 @ Intel 82801JB ICH10 - High Definition Audio Monitor(s) Displays Samsung SyncMaster 920N 19" Screen Resolution 1280*1024
Keyboard Microsoft Comfort Curve Keyboard Mouse Microsoft Optical USB PSU Corsair TX 650W ATX SLi Case Antec 902 Ultimate Gaming Case Black Cooling Prolimatech Megahalems Rev B CPU Cooler Socket 775/1156/1366 Hard Drives 1 x OCZ Vertex2 Series 120GB 2.5" SATA-II SSD
1 x Seagate Barracuda 7200.12 1TB SATA-II 32MB Cache
1 x Western Digital Caviar Green 2TB SATA-II 64 MB Cache Internet Speed ADSL24 FTTC 34.2 Mbps Down 7.1Mbps Up Other Info OcUK 22x DVDSATA ReWriter Black
Akasa AK-FN058 Apache Black Super Silent 120mm Fan
Printer Epson Stylus Photo R300
Scanner Canon Canoscan 8000F