I need some help...

I am new at partitioning and Linux. I did, however, successfully dual boot Windows XP and Knoppix 3.4. It was quite easy, actually, and all the posts I have read about dual booting the two OSs make it overly difficult. jduff posted the best way, in my opinion, to run LILO (linux) and Windows on the same hdds or separate ones:

1)Install Windows XP on main hard disk drive or primary partition
2)Install Knoppix 3.4 on a separate hard disk drive or a secondary partition (I recommend reading up on partitioning first)
2a)Do not load LILO on MBR; put it where Knoppix is
3)Install GAG (graphical boot manager) to hard drive; it burns to first 1024 bytes of hdd
4)Reboot and enjoy!

The problem, though: I don't know what "Low Disk Space" means. I get a frequent message in my quick launch that tells me I am running out of space on drive C: (primary hdd). It is mostly used up. Does this mean I have to resize that partition? This is probably a stupid question, but I feel fine about it here in this forum.

Thanks and cheers!