For a few days now, system very sluggish. I put it down to having plenty of Opera tabs open (217 IIRC), but still far less than I have in the past (several 100s). Closing Opera doesn't seem to help that much. Running World of Tanks, loading a battle from a few seconds (in the past), to now 40-50 seconds for a battle. While playing having hiccups in performance. Checked performance in windows and shows RAM usage at 96% and up. 16GB of RAM. 1TB SSD. Windows 8.1 Weirdest of all, it doesn't show anything actually using that RAM.