SCEP works on a wide range of Microsoft operating systems and almost any flavor of Windows run by a modernized organization. The quick rule of thumb is: if the system can handle an SCCM 2012 client (Windows XP SP2 for x64 and SP3 for x86, or above), it can run the SCEP client. It is essential to identify any legacy systems that will not support SCEP and plan accordingly.
Although SCEP does a great job of removing a competitive AV client before it installs itself, it's a good idea to make sure that your current AV is not going to impede the installation of SCEP in any way.
This recipe contains a series of questions that will assist you in determining your level of preparedness before deploying SCEP. As mentioned in Chapter 2, Planning and Rolling Installation, if your systems already have an SCCM 2012 client installed, then they already have the installation media for SCEP on their hard drive. What we are preparing to do here is, effectively, just flipping...