I've posted my specs before in this thread.
I don't use any VPN, no firewall or anti-virus, usually only two things that are constantly running when I'm using Opera are Discord and Logitech software for my headphones.

I use Logitech wireless mouse.

I'm using - Opera 42.0.2393.94 >Windows 7 Ultimate|AMZ athlon X2| 4 GB RAM| comodo firewall only|
Can not even open more than one tab. There was no problem at 42.0.2393.85 so delete the update and reverted to 42.0.2393.85 again. But today it is happening with 42.0.2393.85 too.
VPN is always on, When I don't use VPN there is not a single incident of "Out of memory";maybe something to do with VPN.

By the way, is there anyway I can download older version of opera from safe place?

Opera have and been and is my default browser because of turbo mode.
Where I live, the only Internet available is Cellphone 2G. I can't Imagine I can surf Internet without Turbo on desktop and mini on my mobile. I really like to use maximum space to be used by webpage. I would really love the 'Compact Navigation' under 'opera:flags' which let me hide address bar, which also shows up when click on tab. Chrome already have this, opera is chromium based now, so I figured I would be easies to add than other suggestions.

Another side request is it would be great if opera sync made available to java based OperaMini (Sysmbian phones). Opera and OperaMini is the only browser I use as long I can remember. Please make at least bookmarksyc available.