Several miscellaneous settings can be made from this window:
Hard drive optimizations
This can improve hard disk access speeds but may not work properly with certain hard drives.
Security level
You can choose from several preconfigured security levels, "Medium" is the recommended level. Choosing the higher security settings will reduce the services available on a machine.
Precise RAM size
If the amount of detected RAM doesn't match what is installed in your machine, you can enter the correct amount here.
Removable media auto-mounting
This enables the SuperMount utility which provides automatic mounting and unmounting of removable media (floppy, CD-ROM, zip, etc.).
Enable Num Lock at startup
This turns on the keypad number lock during the boot process.