Right click on your conquer icon(the one you use to play) > Properties > Compatibility and then under Compatibility Mode be sure to mark " Run this program in combatibility mode for: Windows 7
This is how it should look like "

"
that should fix your problem
P.S if your client laggs(drops your fps from 40 to 10 or lower while jumping, open your conquer folder then look for data folder open it and find Cursor folder, and replace your conquer cursor with original windows cursors