What is your operating system?
Do you want to know what operating system is installed on your computer? Discover in a few seconds what version of Windows or Mac OS X you are running on: surf to microsoft.com or apple.com.
You will also see which processor you have (32-bit or 64-bit) and other details about your operating system (Service Pack, Build, etc.).
Do you have a Windows PC?
Do you have a Mac?