Hi everyone. I've been having issues lately where my laptop locks up. I have a dual boot setup with Ubuntu and Windows 7. In Windows 7, my laptop will at times become very slow and unresponsive; my mouse still moves, but I can't interact with much. If I minimize a window, that window stays up but becomes transparent and unresponsive. Ctrl alt delete just leads to a black screen with a mouse cursor I can move. In Ubuntu a similar thing will happen, where sometimes I'll have times where my mouse can move, but I can't type or interact with anything. The cursor will adjust to the correct icon (hand when holding and dragging a window, though the window won't move, or the uppercase i shape when over text) but again no interaction. These lockup periods can last seconds or minutes, with intervals between them also varying. I assume because there are similar problems for both OSs that there's a hardware problem but I don't know what. Has anyone else experienced anything like this? I replaced my HDD with an SSD to try and fix it but no dice, a clean install of only Ubuntu 14.04 still has the issue.