Bristol_Jonesey
But do you backup before installing the monthly Sonar updates?

Nope

Acronis True Image Home 2011 user here.

I do backup before monthly updates. Before I update, I backup my C drive excluding directories such as temp, download, etc. Sonar data files residing on my D drive are not backed up at that time. After my Acronis backup (recently 43 GB), and before the Sonar update, I'm sure to set a restore point and call it BEFORE SONAR UPDATE (date). After the update, I create another restore point named AFTER SONAR UPDATE (date).

It's the undetected problems that I worry about. It's easy enough to turn back the clock if Sonar malfunctions just after an update. But those gremlins that surface a week or two later, such as a Wave plugin misbehaving or crashes with older projects, those get harder to troubleshoot, and I'm led to wonder if the last update was the cause. The restore points come in handy for turning back the clock without having to reinstall applications.

Bristol_Jonesey
But do you backup before installing the monthly Sonar updates?

Not necessarily. So far they've all been well-behaved.
 

To the point of the OP - I don't do a special backup prior to updating. 
 
I've now installed, then updated S-Plat A thru G and have NOT yet had the need for a backup.  IMO, the experience so far says that the Sonar dev team is doing a pretty darn good job.  Not that I would be happy about a disaster, but considering the new model and all of the moving parts, I think they've handled things remarkably well.
 
  beers all around for the dev team - Noel is buying!!

Oh, and the coffee mugs get better every release too!   

arachnaut
The only problem I found with Windows 10 so far is using Virtual Box 5.0.1. The audio in VBox will not play unless you start audio in the host before playing it in the guest. I've seen this in virtual Windows 7 Pro, virtual Windows 8.1 Pro, and virtual Linux Mint Mate 17.2 "Rafaela" with my Windows 10 Pro host on both Desktop and laptop systems. Virtual Box 5 is announced as not yet being able to support Windows 10, but I'm hoping 5.1 will be out soon.

 
Not familiar with this software. Are you saying you are running Sonar in a virtual machine? How is your latency... Or do I have the wrong end of the stick...

bapu

Bristol_Jonesey
But do you backup before installing the monthly Sonar updates?

Nope

yeah that was my original question...I think if I can remember back....up!