Mouse pointer disappears in Windows when DOS application is running due to mode.
Cause:
Exclusive mode disables the mouse in Windows while the DOS application is open.
Solution:
Deactivate the 'Exclusive mode' in the DOS applications 'Misc' 'Properties'.
1) Right-click the DOS applications icon. (The pop-up menu appears.)
2) Select 'Properties'. (The 'Properties' dialog box appears.)
3) Click the 'Misc' tab.
4) Confirm that the 'Exclusive mode' check box is cleared.
'Misc' tabbed page
5) Click 'Apply'.
6) Click 'OK'.
