Kernel version

[Daniel]

Hello, I just managed to do a dual boot for the first time(windows xp) and
ubuntu 10.04 but I have a question. When I first start the computer it asks
me what I want to boot up. Ubuntu has 4 entries and windows xp one. My
question is why do I have two kernel versions version....x.x.x.x.22 and
version x.x.x.x.23 and recovery modes for each. Why instead of two versions
of kernels, I don't have only one? Let's say version .23. What's the
difference between the two kernels and what does recovery mode? Can anyone
tell me?

thank you so much! Have a great day everyone! :)
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