My only suggestion is a good HDD image software.
There are levels of protection of a PC...probably broken into groups A/V-Malware & Data.
For me I use Avast 8 + MalwareBytes PRO + CryptoPrevent.
Is this 100% perfect.....NO....nothing ever is but for "me" it is a balance of good protection + ease of use + recoverability.
I supplement this with Windows System Restore that I have run daily at noon and on any boot....selected both system and data files.
I also copy critical data files to a USB stick.
I then also use a Cloud Service as backup of my Document Files.....SugarSync (
https://www.sugarsync.com/) for me.....there are many.
But lastly, and despite any of the above is a good imaging software.
Why ?....because all of the above can fail.....a HDD physical crash is one good example.
I have a USB HDD connected to my PC and each night I run a full image during the evening while I'm asleep....at other times a Avast & MBAM scan. The software, free, I use is Macrium Reflect:
http://www.macrium.com/reflectfree.aspxThey are very reputable, always are kept current, easy to use, has both PE & Linux recovery boot CDs you can easily generate from within the software. Worst case you can restore the image, or at minimum you can mount the image with Macrium as a DRIVE and pull files from it.
Anyway like AVs if you ask 10 people what they recommend for backup software you most likely get 10 different suggestions.
Of course, mine is right.