CHAPTER 14 Installing and Upgrading Windows Operating Systems It's hard to estimate how many operating system installations a PC technician will do over the course of a career, but you can be assured that it will be a lot of installations. Because there are so many different hardware configurations in PCs today, almost every computer will react differently to an installation or up- grade. In this chapter, you will gain a foundation of knowledge about the possi- ble installations and upgrades of Windows. Later, after you have installed several operating systems yourself, this foundation will help you to build solid experience. For the 2011 A+ 220-701 exam you need to know how to