For New Steam Installations

• 1). Go to Steampowered.com and click the "Install Steam" button in the upper-right corner. Then click the green "Install Steam Now" button and run the executable "SteamInstall.msi" program.
  
  
• 2). Follow the on-screen instructions until you get to the screen titled "Destination Folder." To choose where on your computer you would like to install the Steam program, and subsequently all of your downloaded games, click the "Browse" button. A new menu will pop up.
  
  
• 3). Click the drop-down menu titled "Look in:" to choose the hard drive and folder where you will install Steam and save your downloads.
  
  
• 4). Follow the on-screen instructions to complete your Steam installation.
  
  

Move an Existing Steam Installation Folder

• 1). Shut down Steam completely.
  
  
• 2). Find where Steam is currently installed on your computer -- the default location is C:\Program Files\Steam\ -- then delete all files and folders, except the SteamApps folder and the Steam.exe program, which you should cut to your Windows clipboard by highlighting and pressing "Ctrl" and "V."
  
  
• 3). Create a new folder wherever you want to move your Steam installations. For example, if you wanted to change from the default hard drive location, you could choose a second hard drive -- for example, "D:\Steam." Paste the files you cut from the default location in this new folder.
  
  
• 4). Launch Steam, which will automatically update to the new location where all of your future downloads will be stored.