1) On using control panel to create a image of the "c" (system drive).
As gomer indicated Windows control panel has an excellent imaging Backup; However, uSoft in their "not smart" move Buried it. Need to direct it to a 2nd HDD, or your external backup drive.
To access it:
http://www.itworld.com/consumerization-it/333466/create-system-image-backup-windows-8s-hidden-backup-tool
NOTE: after image is completed, you will be prompted to create a bootable repair disk.
.. @ Gomer, You can use either a windows Installatin disk OR the bootable repair disk that you will be prompted to create. Normally just boot to the DVD disk, select repair, then restore using image.
2) runswindows95 makes an excellent point. I normally do both as a precaution.
3) as doger46 indicated, You can add a partition Without a reinstall.
.. A) FIRST make sure you have a backup incase things go wrong.
.. B) Can simply use built in "shrink volume". To do this just go to control panel, disk management Highlight your C: partition and select shrink. Then initialize and partition and format NEW unallocated space.
NOTE: Not sure if win 8 is identical to Win 7; but if it is there is one problem that May need to be resolved. If shrink only indicates a small space to shrink it is because of the Hybernation file which for some reason is stuck at the end of the partition. Also it is a hidden/system file and can not as such be deleted.
BUT you can disable hibernation, reboot and it should be gone.
Disable hibernation:
http://support.microsoft.com/kb/920730
PS if reboot did not delete the file then just run Disk cleanup.