Not to be confused with Compal Electronics. Compaq (a portmanteau of Compatibility And Quality; occasionally referred to as CQ prior to its final logo) was a company founded in 1982 that developed, sold, and supported computers and related products and services.
Windows Defender is a freeware program designed to protect against spyware and other unwanted software. Windows XP and Windows Server 2003 users who have genuine copies of Microsoft Windows can freely download the program from Microsoft's web site, and Windows Defender ships as part of Windows Vista and 7.
On a desktop, the hard drive activity light is usually positioned on the front of the computer case. On a laptop, the HDD LED is usually located near the power button, which is sometimes next to the keyboard and other times on some edge of the computer. On tablet and other small form factor computers, the hard drive light is on some edge of the device, usually the bottom.