I recommend at least one if not two full images of your OS and data partition onto at least one if not two external hard-drives.
RolandJS, Fantastic Idea that I've been practicing for quite some time & have passed on to many, though I suspect most of the time this falls on deaf ears. My most important installs are imaged weekly, and alternate backup drives when doing so. Why? Because while less prone to, even backup drives eventually fails, and it's best not to have all of one's backups on a single drive. Rather two or more, I have at least 6, and a couple more could also be used in a pinch. Until these various 'crypto' Malware attacks began taking place, would install a extra drive just for backup & disable defragmentation for that drive, these days, that's not a good idea. Backup drives should be detached as soon as finished with, and it's best to use a WinPE solution for backup/restore/cloning.
I also use & recommend Macrium, and have added the option at boot to enter the Macrium WinPE environment (a choice at boot) that'll allow backup, restore, the checking of images, and finally cloning of drives. It's so simple to use that a 12 year old can do it, if used to running computers, and many youngsters of today are computer literate. Otherwise wouldn't be on social sites when they should be doing their homework.
Yet actual backup rates are no more as a percentage of users than at the turn of the Millennium over 16 years back. Though I build my own backup drives to save money & know what I have, retail packaged backup drives are at all time lows, and with Macrium (free version), there's little excuse not to backup. One indicator that backup rates are no better or may have dropped, are the ever growing list of various Topics that can be marked as solved with one of two items. A backup that was taken when the computer was healthy, and secondly, the recovery disk set for reinstall was never created, compounded by the fact that any Malware or OS corruption may have broken the 'hook' that the certain hotkey for Recovery needs. Which can get anyone out of a jam.
The 'Am I Infected?' line gets longer by the month, not to include all of the other Topics that involves everything from OS corruption to HDD/SSD failure. Then once fixed, the person still hasn't learned their lesson & doesn't bother with backup, will eventually need assistance again & again. As a result, neither does their family members, including children old enough to use a computer, learn the importance, until disaster strikes once again. Prevention is far more effective than cure, and even assuming they've created recovery disc sets, there goes months or years of data (including memories such as pictures) down the drain.
I practice what I preach, and all of my computers now gets at a minimum, a backup image every other week, plus one right before Patch Tuesday, already marked on the calendar for the entire year. Why before & not after? Because sometimes updates messes up the system, one reason why I only install critical security updates when released, and the rest a few days later. At least once yearly, Microsoft will deliver a bad update & has to pull it to fix, then reissue or replace with a working one. Still, with a backup drive & Macrium, all one needs to do before Patch Tuesday is create a backup folder bearing the name with month & year. Then boot into the WinPE environment & create a disk image, it's as simple as that. Restoration is just as simple.
Even the SDHC card of my camera gets a backup regularly, will attach to the built in card reader and copy by drag & drop to one of my backup drives, and do the same to another SDHC card (a clone).
We can lead a horse to water, yet we can't make it drink.