I also have an Octa-Capture and haven't experienced any problems thus far (knock on wood!).

I sent an e-mail to Roland tech support to see if this is a known issue with ASIO drivers vanishing after a crash.  If I hear any anything back, I will let you all know.
 
Seems to be quite a wide array of experiences on many different systems so no smoking gun.
 
Wish I knew which corporation will own Cake next so I can buy their audio interface early.  
 
JR

 
 
I thought I had solved the problem by disabling Octa capture inputs and outputs in windows sound, however that ended up not fixing anything.  The issue came back with a vengeance...
 
I got a response from Roland asking me to uninstall the drivers and re-install letting windows find the drivers on the inter-webs, below is the response.  Since doing this things have been pretty stable.  Sonar has crashed a few times, but it actually saved a recovery file, send a de-bug report to cakewalk and izotope, and did not remove the ASIO drivers.  I call that a victory !!  Whooo Hoooo 
 
(important to note that you uninstall drivers by removing the App, not from device manager.  If you remove drivers from device manager, the app is still there on your PC)
 
We would recommend uninstalling and then reinstalling the driver:
https://www.rolandus.com/support/knowledge_base/217383066
https://www.rolandus.com/support/knowledge_base/218287223
Also be sure that the OCTA-CAPTURE's version is 1.5 or later. To check the version, turn off the OCTA-CAPTURE and turn it back on. The version number will appear on the screen while it's powering on. If it needs to be updated, this can be downloaded here:
https://www.roland.com/global/support/by_product/octa-capture/updates_drivers/890e6f23-7e0a-4af4-869e-722d6f690ba4/
 
Hope this helps....if the issue comes back i will let you all know.
 
JR

Works nicely so far...but more latency than I hoped with plugins turned on during recording..trying to figure a work around on that one...though no deal breaker. Aside from turning the latency setting down(which so far led to the dreaded click/pop syndrome)...anyone have good advice? I was impressed that I can record in MC7 (on laptop)...and monitor(listen) to a song/vid on youtube while recording/playing guitar n singing at same time with no issue via the Octa. Very impressed on this.

...wicked
...  I wonder if they're end-of-life. :-(

Looks like it: https://www.roland.com/us/company/press_releases/2017/ROLAND-DEBUTS-RUBIX-LINE-OF-AUDIO-INTERFACES/

Sh03e
 
Yeah in my case there's something with CA-2A, BT-Analog Trackbox and Rapture Pro, i can't open or insert that plugins without a risk of crash but after the crash (need to unplug and plug again my QuadCapture) SONAR can be opened again, there's something wrong here but i don't know who is responsible, if i use the rest of my audio arsenal, SONAR and Roland QuadCapture are rock solid, maybe the devs can figured out with the Event Logs i posted.

 
That problem is not with Roland Octa-Capture or Quad-Capture, that's a Cakewalk problem.
 
Click the the link for the resolution from Cakewalk
http://forum.cakewalk.com/1317-Update-Instability-with-certain-Cakewalk-plugins-after-recent-Windows-10-updates-m3526221.aspx
 

I will be testing to try to achieve lower latencies with plugs turned on....no issue at all if plugins are off while recording.