Mouse feature compromised?

Hi, in this scenario only Windowed mode is allowed because configuration must align with boot loader;
now Windowed mode will not allow the cursor to move the map in any direction because one side is occupied by the OS Taskbar (presumably if Taskbar be appointed to any other side, that side will be occupied by Taskbar).
Also the top of the window will not be responsive in a full swing but needs a millipoint intermediate to initiate scrolling.
High Resolution is supported so even Highest PCMonitor alone can be good even for Windowed (not fullscreen windowed!)
Any suggestions?