To start off with, Windows tried to keep 7.8 megs from your drive "free" for it's own "Partitioning Tools"...
Second... The skipping thing normally happens when there are files in use and it normally asks you if you wish to scan the next to you boot up windows!!!
This shouldn't be anything to worry about, but you could click Yes, but remember to backup ALL the files and folders that are on the drives before hand, just incase it "screws" up the partitions!!!!
I hope this helps!!!