Macrium has a great (with free single user version) backup for Windows. Have also found it nicely compatible with the "Windows NAS box" concept. set and forget configurations to whatever level of full / incremental backup you want. Macrium Software | Reflect Free Edition. Is smart to also use their included feature to create a rescue disk (don't forget to use the option to include any drivers your hardware has installed onto the rescue disk). Then total boot disk failure is also fairly easily solved. Can then pitch the bloatware laden rescue disks that came with your retail PC 
Oh, and for any other OS "roll your own" NAS boxes (most of which are Linux), Redo is really nice, esp. since this last release. http://redorescue.com/