I am running 32bit windows starter on a samsung N150 notebook, I am thinking about buying a new installation CD, will it install over my existing faulty windows 7 or will I have to remove programs first,,simple answers please for a simple person 

My Computer
At a glance
windows 7 starter 32bit
- Computer type
- Laptop
- Computer Manufacturer/Model Number
- samsung N150
- OS
- windows 7 starter 32bit