I want to suggest you some must-have programs.
1. Power ISO. It is the best program for using "images". It is easy to use and powerful program. You can easily mount, make dvds from .iso, .nrg etc.
2. I want to suggest you Opera for browser. It is nice, fast and secure browser, which has a lot of extensions, which can be very useful.
3.Power suite. It is great software, which saved my computer. It fastens your computer for a lot of times. It takes your computer specs and costomizes windows's visual effects to run it faster, but it is not the only thing that it does. It does a lot of things to fasten your computer. Anyway check it, you wont regret.
4.Libre office. This is best open-source alternative for microsoft office. I cant say it is better than office but it can replace it if you are not using it professionally and you wont spend money.
5.Ccleaner. http://www.piriform.com/ccleaner (i got bored).
6.Zune player. The best program for music.
7.UBUNTU. it is linux distro. With linux you wont spend money on programs above. Ubuntu is nice, easy to use distro, which has a lot of GREAT and FREE programs for it. My words are not for gamers(if you are gamer, use windows with programs above).
If you have any more suggestions, feel free to tell me and i will update my post.