No, probably not.
Fragments are all ther little bits of data from files that are left over when you install and uninstall progs, move files about and generally do pretty much anything on a computer.
It slows things down because it's rather like trying to read a book (a file) in a library...if you (the PC) have to go to 35 different places to read a page at a time, it'll take you ages, but if it's all together in one book, youcan just find it, read it and that's it.
Windows has its own defragmenter built in which may not be as flash or fast as one you can download (I've no idea, I've never used a different one TBH but I can't see that someone would produce a different one if there wasn't a reason like that behind it) but the windows one works fine.....
Click the START button, then ALL PROGRAMMES>SYSTEM>ACCESSORIES>SYSTEM TOOLS and you'll find it in there......select the drive you want to look at (if you haven't done it before, do the 'c' drive first)
then click analyse and see what the result it....accept its recomendation (does need defragging or not) ..you can have it running while you do other stuff so it's not a big deal....all you'll see is the light for the Hard drive flashing a lot and maybe a bit of whirring going on.
It can take quite a long time to complete but you can safely minimise the window while you get on with looking at pictures of naked ladies and so on.
HTH
