So, my hard drive holds 30GB total, and apparently i'm already using 25GB, even though I have like 8 Microsoft Word documents, and a few pictures. What could some possible problem sources be?

thanks

You could run an advanced search for files bigrn say, 15Mb
& see what develops. Ought'n 2b very many.

Programs???? What OS? What partitions?

try defragmenting the disk, maybe you're looking at a smaller partition of that drive?

Stuff in the Recycle Bin still occupies space. How much do you have in there?
Install a free copy of "DiskFrontier" from http://dl.winsite.com/bin/downl?500000031670 to study your usage of space.
If you have the drive partitioned as one big partition, then the clusters could be huge and there could be a lot of "slack" [unused/unuseable/wasted space], but I doubt if it could account for this. Worth thinking about though.

Does Windows show your C: partition/drive as 30GB with 25GB used?