Installing ESX is actually quite easy. Different installation methods exist (the trickiest being the scripted method), but overall ESX Server installation is straightforward. The pre-installation and post-installation requirements take the most time, however. In this chapter, we'll walk through the GUI-based installation method for loading ESX 2.5 as well as the tasks you need to perform before you install ESX and afterward. We'll also cover what you need to do if you run into problems during or after your installation.