For older versions of Hyper-V, you will need to insert the Integration Services Setup Disk, which is the ISO of the setup file. For newer versions, this step is unnecessary. Enhanced Session mode must be turned on, and both server and user options must be enabled. Data Exchange must also be enabled in Hyper-V Manager, and the Hyper-V Data Exchange Service must be started. Finally, if your mouse driver is outdated or missing, reinstall it to ensure proper functionality.
If your mouse is not showing in RDP or Remote Desktop session, it may be due to a corrupt driver. Reinstall or update the driver before attempting other solutions. To capture mouse input in Hyper-V, click on the virtual machine screen or use the keyboard shortcut Ctrl+Alt+Left arrow to release a stuck mouse.