Read the manual and the computer specifications.
Generally speaking any computer produced in the past 3 years has at least
one USB port. However, it's helpful to do the a little research.
If you can't go to that degree then go into the Control Panel, System
Folder, Hardware Tab, Device Manager, and then scroll to the bottom of the
devices shown and expand the Universal Serial Bus Controllers. If you see
listed the word "Enhanced" for any of the USB controllers then you indeed
have at least one USB 2 port available.