I too am running 8.1 and installed Coretemp just to see. I have been running my SP since the day it was released, driving a 27" monitor, a usb sound bar and 6 GB of external storage and a Blu-Ray player. It has always run warm to the touch, but not too hot to handle. Coretemp says it is running 58 to 61 C, or about 135 F. This seems warm to me, but it still feels the same temp as before. Warm to the touch but not hot. Several add-ons from the coretemp download page attempting (actually doing so, really) to change my start page and my default search engine. Search redirect malware, if I say so myself. It even managed to install a Genieo homepage button in my taskbar, all without my ok or approval. The new face of malware I suppose. Uninstalled via Chrome settings, but still...