Actually, version is 3.5.2, but that is not on the dropdown.
A few days ago I started getting 500 errors on my site. cPanel showed virtual memory and I/O pegged at Max.
I disabled all plugins, but that did not reduce VM and I/O. I then asked my ISP to reset my account, which killed all processes and restored VM and I/O to normal levels.
I then enabled plugins one by one, leaving time between each to see if there way any effect. When I attempted to re-enable Better WP Security, the operation did not complete. When I checked CPanel, VM, Physical memory, I/O, faults, and entry processes were all pegged. I have a screen grab of the resource monitor, but I don't see a way to attach it.
After disabling BWPS by renaming the plugin file, the site started working again, however, VM, Physical memory, I/O, all remain at or near max. I have a resource monitor screen grab of that too.
I have not changed plugins or themes in months, and this problem came on very suddenly a few days ago. (I have that screen grab as well.)
I don't know how to find the plugin update history, so I can't tell if this coincided with an update of BWPS or another theme or plugin.