Cleaning up 324 unused index entries from index $SII of file 0x9.
Cleaning up 324 unused index entries from index $SDH of file 0x9.
Cleaning up 324 unused security descriptors.
This is saying that those security indexes were no longer in use and that it deleted them. They are most likely security indexes for web sites. Like cookies.
488375968 KB total disk space.
76276476 KB in 75710 files.
27700 KB in 5033 indexes.
0 KB in bad sectors.
176044 KB in use by the system.
65536 KB occupied by the log file.
411895748 KB available on disk.
This is giving you information on your drive that it just ran the check on.
The first one is of course the Free Space in KB.
The 2nd section shows how much space you have taken up and by how many files.
The 3rd one shows how many indexes you have for the system and the amount of space they take up.
The 4th one tells you about the bad sectors if any it found. It didnt find any so that is a very good sign.
The 5th one tells you how much space your system files are taking up.
The 6th one tells you how much space your check disk log is taking up.
The last one tells you how much free space is left on your system in KB.
Does that help explain it a little bit? Do you need some more clarification?