Hi Adave018,

I am afraid the option to disable Hyper-Threading is not available in Vostro 3450. BIOS does not have this option.

And you are correct, the “Main” section of the BIOS helps in changing just the System Time/Date.

However, the other sections available “Advanced”, “Security”, “Boot” & “Exit” allow users to change settings as listed below:

• Advanced: Advanced menu contains USB configuration, devices behavior and miscellaneous devices settings.
• Security: This section displays the security status and also allows user to manage the security features of the system.
• Boot: This section allows the user to change the boot sequence behavior by using the arrows keystroke.
• Exit: This section allows user to save, discard and load default settings before exiting from the Bios.

If you have any further questions feel free to reply.