is this right?

ive been running defraggler for about...15 hours now.its been stuck at 75% for about 2 hours.also,ive lost about 7gb from degfragging!is this supposed to happen?please help,thanks! :)

i started around 50gb.help with that too?my specs are: Intel® Celeron® CPU 540@ 1.86 gigahertz 2gb ram 32 bit operating system

post-29005-1243691204_thumb.jpg