Having a little issue with my PC. Opened the case up yesterday and cleaned all the dust out, and while I was at it, I noticed that my secondary HDD either hadn't been aligned properly by the company I bought it from, or had been dislodged during delivery. Surprised that it had even worked at all for this amount of time. So I placed it properly in its tray, then put everything back together. Then when I booted the PC, I got a weird whirring/grinding noise coming from the case. Rebooted, happened again. Started it for the third time, and the noise was gone. Now today, turned it on, got the noise again. Put the PC in sleep mode, then turned it back on, and the noise was gone. Anyone have any idea what this could be resulting from?