Acer laptop touchpad not responding with cursor

Hello,
I have a problem with my Acer window 8 laptop, touchpad not responding with the cursor on the screen. I tried pressing fn+f7 still not functioning..also tried fb+f6 still not working. I also tried turning it off and putting back on still not working. I just installed Microsoft office yesterday and it was working fine..now the cursor won't move could you please help?