Up to date W10 system here.  Until the most recent update, I could count on one hand the number of times I had the audio engine stop the whole time I have been using SPLAT on this machine.  Now it happens at least once a session. Not a show stopper for me, but a little annoying. I have suspected the Adaptive Limiter, (which I love btw) but have no hard evidence.  Though it would not surprise me if it were a windows issue.

I haven't updated Windows 7 since I installed it. no need ... audio system only

I was getting these same dropout symptoms but realized it was a corrupted project ile.  I reverted to an earlier version of the song and was able to paste in my more recent edits and now all is well.  I 86'd the bad file.

My system had always been extremely stable, the only crash I'd encountered happened when rendering a melodyne clip. It never happened again so I regarded it as a glitch.
 
However, having installed 2017.5, I attempted to bounce an 3 minute mono audio clip and Sonar locked up (no progress bar activity followed by a white screen). I opened the task manager and saw that the memory usage for Sonar was 1.5GB and rising. By the time I decided to force closure the figure was in excess of 2.6GB.
 
I restarted my workstation, reloaded the project and repeated the bounce without issue. Not ideal, but considering how many years I've been using Sonar without incident, I guess it's hardly a major problem.
 
I'm always suspicious of W10's habit of updating itself with little or no regard to running programs. Only last month I was running a live Unity 3D presentation when Windows decided to update my graphic card drivers resulting in a major crash. In some ways, it's quite a dim witted OS.
 

It seems odd that systems that were once reliable are now having problems.  It does make it sound like there's something in the 05/2017 release, but having said that, PCs are not real-time machines and that's what any audio system needs, so it is worth going through the exercise of optimising.  When I "upgraded" to a new, latest edition i7 laptop and had dropouts, I found the most comprehensive one-stop shop for optimising a PC was here:-
 
https://support.native-instruments.com/hc/en-us/articles/209571729-Windows-Tuning-Tips-for-Audio-Processing
 
There's stuff in there, I didn't see elsewhere - it's worth going through carefully IMHO.

Hi all,
 
I've been having dropout and glitching issues for a while now. I have win 10, and have had Sonar Platinum since day one. I get glitching with the lowest number of tracks, even sometimes with one, worse with heftier VSTs like Omnisphere. I'm running an i7 6750, with 32G RAM, so more than enough. NO amount of buffer adjustment helps.
 
The adaptive limiter is useless tbh as its so flaky. PLenty of audio drop outs too, certainly in the last 6 months or so.
 
So bad, I thought it was my interface (Komplete Audio 6). Drivers are the NI proprietary ones, not ASIO4 All.
 
On top of that, I have just entered the world of pain that is Automap. New Novation Impulse 61, lovely player, but Automap is about as automatic as a 50 year old self winding Timex.
 
I have used Cakewalk's DAWS since the early days, but I am slowly getting to the end of my tether with it.

You're tagging on to a pretty old thread. You might want to start your own. It would be less confusing. Are you still on 2017.5 like the OP?

I think that to get some effective assistance you might want to include more info. When did this start? Anything thing new or different on your system? What's your video card and are you using good up-to-date drivers? What are your other system specs besides RAM and processor? MOBO and BIOS, background programs? Have you tried a system latency check with DPC or some other tool. Those are the kind of questions people seem to ask with problems like yours. 
 
Good luck.