System Restore is a valuable safety feature, but it doesn't need to take over your hard drive. By checking how much space it's using, deleting old restore points, and setting a reasonable storage ...
Most prebuilt/OEM systems I've seen come with a system restore partition, or a utility that will let you make a set of restore disks. For any system I get rid of (personal, or business) I run Kill ...
The worst-case scenario has befallen even the most careful computer user: a coffee mug spills on your laptop or an update wipes all your files and photos. Despite your best effort, accidents happen.