I read this thread with interest and disappointment. It is now August 10, 2015, and it appears that the problem is still not finally solved.
I have two machines: a tower computer and a notebook computer. Until a few days ago, both were running under Windows 7 Ultimate and had Pure 3.0 installed. On both machines, I have Outlook 2010, which worked very fine so far.
Then, I upgraded the notebook to Windows 10. In this process, Pure 3.0 was automatically uninstalled since it seems to be incompatible with Windows 10. Fortunately, Kaspersky offers a free upgrade to Total Security 2016 for existing users of Pure 3.0. Therefore, I upgraded the notebook to Total Security 2016, after (!) the upgrade to Windows 10. All seems to work fine so far, and Outlook behaves well with normally 0 to 2% of CPU usage when inactive.
Since I plan to upgrade the tower computer to Windows 10 as well, I decided to install Total Security 2016 even before the upgrade to Windows 10. This machine is currently still under Windows 7, and the upgrade to Windows 10 has not been made yet. On this machine, I have now the problem that Outlook 2010 gradually increases the CPU usage, and after a certain time (despite inactivity), it goes up to close to 100%, and the machine becomes unresponsive. Due to the high CPU load, also the CPU temperature goes up to over 50 degrees centigrae (normally below 40 degrees), and the CPU fan goes on high speed.
Based on my experience so far, it seems:
- Pure 3.0 and Windows 7 are compatible.
- Total Security 2016 and Windows 10 are compatible.
- However, Total Security 2016 causes problems with Outlook on Windows 7 machines.
Given this experience, I plan to roll back on the Windows 7 machine to Pure 3.0. I will install Total Security 2016 (again) once I upgraded this machine also to Windows 10. (Meanwhile, I might perhaps try the beta fix before rolling back to Pure 3.0 - just to check whether it works).
I will keep Total Security on the notebook computer, which already has Windows 10 installed.
I hope these findings may help.