Open an elevated Command Prompt (run as administrator), type or past this command powercfg -h off and hit Enter. Now see whether the 2.4GBs have disappeared (after reboot).
My Computer
At a glance
Vista, Windows7, Mint Mate, Zorin, Windows 8from 1.6GHz Duo to i7
Computer Manufacturer/Model Number
HP, Dell, Gateway, Toshiba - 4 laptops and 2 desktops
Open an elevated Command Prompt (run as administrator), type or past this command powercfg -h off and hit Enter. Now see whether the 2.4GBs have disappeared (after reboot).