Windows 7 Windows Defender + Trend Micro Titanium keep switching off/won't open

[em1992]

I was wondering if someone could help me, I have Windows Defender and Trend Micro Titanium 2013 installed on my Windows 7 laptop and the past few days, they keep switching off and I can't open the Trend Micro Titanium 2013 console at all, even after re-installing it and rebooting my laptop. Does anyone have any ideas as to they both these programs aren't working properly? Do I maybe have a virus which is causing this behaviour?