How do you burn a iso file to a CD?

An iso file is files already prepared into 1 file.
You can Burn these to a CD/DVD/Blue-ray first
Get Nero Express or CD Burner Xp
The click on the tab- (Youll need your CD/DVD in your CD draw in the PC)
Burn ISO> Then load the file> And clik Burn.

Hope this helps :) :) :)