What files are backed up when you do a system-state backup?Only the BIOS/UEFI settingsBoth data files and configuration filesConfiguration files such as the Windows RegistryAll the data files

A system-state backup typically includes configuration files such as the Windows Registry. It does not back up all data files or BIOS/UEFI settings. It's primarily used to recover a system's configuration in case of corruption or failure. Here's a step-by-step breakdown:

1. System State Data: This includes boot files (Boot.ini, NDTLDR, NTDetect.com), the Windows Registry including COM settings, the SYSVOL (Group Policies and Logon Scripts), the Active Directory and NTDS.DIT on Domain Controllers and, if the Certificate Services are installed, the Certificate Store.

2. System Files: These are under Windows File Protection. In case any of these files gets deleted, they are automatically replaced by Windows from the cache stored at %Systemroot%\System32\Dllcache.

3. Performance Monitor Configuration files: These include the Pla.dat, Pla.adm files and the files located at %Systemroot%\System32\Perf*.*

4. Component Services Class Registration Database: This is the COM+ Class Registration Database stored in the %Systemroot%\Registration directory.

Remember, a system-state backup is different from a full backup. A full backup would include all data files, applications, and system files, while a system-state backup is more focused on the system's configuration.