If you will not be available at 8pm, please try this and let me know the results :
Problem 1 :
1-Click on the Start, Go to settings option , go to devices, click on mouse and touchpad, scroll down to additional mouse options, click on the ELAN option.
2-uncheck "Disable when external USB pointing device plug in" then click on enable device button
click apply then ok.
3-go back to the ELAN window and this time, click on Hardware option, double click on "ELAN Input Device" and click change the settings. now click the driver tab and click roll back device then click yes.
4-Restart your computer and check.
Problem 2 :
Open Sound applet from Control Panel. or type mmsys.cpl command in RUN or Start menu searchbox. Or right-click on Speaker icon present in system tray and select "Playback devices" or "Recording devices" or "Sounds" option.
Now go to Communications tab and check the option Do nothing and Apply it.
the problem shoud be fixed now
let me know if you need further help