Welcome to windowsbbs.
Please see:The Windows Explorer Totorial (pay particular attention to section entitled If your screen is not split in two like the one above, do this http://www.homeandlearn.co.uk/bc/bcs1p6.html
Please note "program Files" is located in a subfolder of an expanded C:\drive.
Make sure you have adjusted or set your folder options to show system and hidden folders. See:
Set your folder>view options s shown,
1>Click on My Computer icon or right click startbutton and choose "explore".
2>click on menu toolbar>"tools"
3>click on "Folder options"
4>click on "View" Tab:
5>and scroll to the [Hidden Files and Folders] section and enable or disable the options below by unchecking or checking as designated:
"Do Not show hidden files"=unchecked (or click the "show hidden files")
"hide file extensions for known files"=unchecked
"hide protected system folders"=unchecked (optional, users choice)
If your problem is more complicated then the above, you may have to be more specific in describing your problem using more details.