Android tv remote for phone, don't know about pc https://play.google.com/store/apps/details?id=com.google.android.tv.remote
try this, https://github.com/lukedoomer/Adb-Remote-Screen universal remote control through adb. this is my own forked version.
You can use an Android emulator like nox, Andy or blue stacks and install a remote control app.
TeamViewer
Android tv remote for phone, don't know about pc https://play.google.com/store/apps/details?id=com.google.android.tv.remote