Hi All, Home PC has been booting slowly for quite a while. I've never really bothered about it as I usually turn it on, walk away and come back to use it later. But it has an SSD and when first installed it took about 10-15 seconds to bootup. Now it takes upwards of 60 seconds. Interestingly if I click to browse the D: drive for the first time in a Windows session it hesitates for quite a while and you hear the disk "spin up" while it does so - 10-15 seconds later, up comes the contents list in Explorer. The disc model is HGST Deskstar 7K1000.C HDS721010CLA332 - hard drive - 1 TB - SATA-300 Series if that helps. The Samsung drive labelled E: spins up instantly and opens browse in contrast. I have one network drive to the NAS connected but it browses instantly as well when opened. PC details here: Click to view full size! Any suggestions or ways I can begin to troubleshoot? Also - only started in the last week or so - when the PC is powered on at the wall it makes a really high pitched constant tone (quiet whistle is the best way to describe it). If I turn the PSU off using it's switch it makes a sound like "winding down" quickly then stops. I've tried unplugging power into each device while PSU is on but PC is off, doesn't change. The pitch of the noise changed a couple of times as I moved the mainboard power harness wires to reach into the PC. The noise is there when the PC is running as well. Any ideas on this or where to start troubleshooting? Thanks.