Here are the instructions for downloading and installing Wampserver and adding your website site to the server. (If you have windows, use MAMP if you have a mac)
Go to www.wampserver.com/en
Click Downloads
Click DOWNLOAD Wamperver 2.0i
Click the green Download now! button
*Click run
Wait for the file to download
*Click allow
Click next on the Wampserver setup wizard
Accept the terms and click next
Click next
Click next
Click install
Choose your default browser (if you have more than one installed)
*Click unblock
Leave the SMTP as localhost and the email as you@yourdomain
Clicknext
Click launch now
A small icon will appear on the right hand side of your taskbar (near the clock) it looks like a white bridge, left click this icon and click www.directory
Copy and paste the your website folder into the directory.
When its finished copying left click the bridge icon on your taskbar again and click Localhost
Under the title Your projects you should see a link called whatever the name of your site folder was. Click this and (fingers crossed) the site will open.
*depends on the security settings on your PC.