Something has altered in how 8.1 updates where the cursor is on screen, meaning games that don't take direct raw input from the mouse are suffering terrible cursor-jumping lag.
Titles said to be affected include Call of Duty, and sniggering aside, it should also be noted that among the afflicted are Deus Ex: Human Revolution and Metro 2033.
S.T.A.L.K.E.R.: Call of Pripyat is also reportedly hit by the cursor blight of 8.1.have come up with a flimsy Band-Aid for this gusher of a wound but ultimately it needs a solution from Microsoft, or a downgrade to Windows 8 or 7... or Vista, or XP, or 2000, or 98 SE, or 95 IE, or DOS.
Save us SteamOS!