What does this mean, and is it a good idea?

[Jack Bando]

My PC has been having issues lately (locking up when turned on, sometimes it will lock again and maybe a 3rd time), and the PCs website says to do this...
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Turn the computer on.
Press the F8 key repeatedly when the first screen appears, about once every second, until a menu appears.
Use the Up Arrow or Down Arrow keys to select Delete restoration data and proceed to system boot menu (1st) or Last known good configuration (2nd).
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The bolded part worries me. What would that do? Would it delete a lot of my files?

Please help, I'm trying to stop the lockups, but don't want to do more damage by wiping out my data.