EDITED:
I read the manual. & it says F2 just like you said . It says to wait until the Samsung Logo appears & hit F2 while it is present.
I might suggest that you power down the unit , unplug & remove the battery. press the power button & the drive button a few times to drain any residual power that may be holding any kind of charge in any circuits. Drain it DEAD .
Then return the battery , (& plug it in if the battery is low) Then Boot.
Again at the Logo , press & hold F2.
ADDITIONAL RESTORE OPTIONS:
I also read that there are 3 restore options with the Samsung models.
You actually need to enter the restore program to see if it has them. It it only has the COMPLETE system restore "where everything needs to be deleted & installed again" You can cancel at any time.
It may have the option for ....
1 Basic restore : Restore ONLY major Windows Files in a short time
2 Complete Restore: Restore C drive to the previous Normal State
3 Data restore : Restores Important files &/or folders to a previously Backed up state.
If you decide to use any of these restore options You SHOULD start with a charged battery
And , PLUG IT IN ! To prevent any chance of a possible Power failure
To Enter: Reboot.
At the Logo , Press F4. If the F4 key does not function , reboot & try again, this time repeatedly tapping the key during the duration of the logo screen
Samsung recovery solution will appear. ( Touchscreen & other optional functions will not operate during this mode)
By clicking " Select Symptom", a Symptom menu appears.
If you Select a symptom , a recommended option will blink. Click the option to continue.
Select BASIC or COMPLETE from the menu
Recommend select BASIC.
You should only run COMPLETE Restore ONLY if a BASIC was tried first and failed.
http://www.samsung.com/us/support/owners/product/NP300E5A-A02UB
Click ALL downloads:
Trouble Shooting Guide (User Manual) (ver.2.0) Chapter 4. ( Restoration)
User Manual (Windows 7) (User Manual) (ver.1.3)