hello my friendly linux brothers & sisters

im not sure when this happend because i havent restarted in a long time but i have been logging out and logging back in for the last couple days. but anyway yesturday i did an apt-get update, installed mldonkey and downloaded some mp3s with it. you know stupid stuff like that

but last night i went to shut down my computer and it locked up and wouldnt shut off so i had to physically hit the power switch to shut off.

then this morning i started it up and it posted fine but after the post in the Grub thing now it says this....
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GRUB

Fedora Core 2.4.22-1.2174.nptl
Fedora Core 2.4.22-1.2115.nptl

and it says i have like 10 seconds to pick one.
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is this gonna be a problem? im running out of space on my hard drive is this taking up space cause i have two operating systems? which one is better the 2115 or 2174? i booted into each one and they both look the same and both are pretty much the same that i had last night.

does anyone have any guesses why this happend or other info?

Don't worry. I have'nt been using RedHat for years, but these are probably just different kernel versions. Kernel itself takes approximately 2MB of disk space. Modules take a little bit more.

RedHat must have issued a security patch or something. So it's just new improved kernel what you have probably accepted yourself.

ok thanks for the reply Sohni. i feel like an idiot for asking this cause im such a newb but which one should i highlight to boot with?

Fedora Core 2.4.22-1.2174.nptl or Fedora Core 2.4.22-1.2115.nptl ?

i assume the 2174 is better cause it has a higher version number so its newer? sorry for the newb question.