I have a similar sized hard drive and keep one partition for the operating sytem; one for documents and general work, one for downloads drivers etc and one for temporary video etc. The last one I keep for images of the other drives.
To me the big advantage of having the operating system and programs in a partition separate from the saved files is that if it gets corrupted I can reformat and reinstall the software without losing any of the other files. I also have a separate partition for a backup of the C: drive to make it easy to restore after reformatting. This may not be as safe as backing up to a removable drive, but it has got me out of trouble on several occasions.
if you don't partition this, and you need to restore your OS for some reason or the other (and we all do), you would lose everything. If you partitioned into 2, say, with 5gb for OS and remainder for everything else, then if your system became corrupted and you need to restore it, you would not lose the 115gb bit, or what ever.
Plus (nearly forgot), it makes defragging a little more manageable - - though not by much in the above example, but certainly for your OS, in that example - - - this hole I'm diggin is getting deeper and deeper ain't ti ???? I'll get me coat
Just one more thing, and am not hijacking this but - - - if one was to partition in a manner similar to above, OS on one, programs on another etc etc - - -if the OS did need restoring, would the programs installed on one of the other partitions work ? Would the register thingy be OK ???
matt45, I don't think it would be a good idea to separate the operating system from programs and games. When you install programs and games they are integrated into the operating system to such an extent that you can't treat them separately. I have in the past had them on separate partitions, and it really was too much of a nuisance. The installers default to the same partition as the OS, and in some instances the installation was split across the two partitions. If you did have to reinstall the OS, you would have to reinstall the programs and games anyway.