ACER Aspire R15 i7 _ 3

 

Troubleshoot why all of a sudden the "Touchscreen" mode on the ACER Aspire R15 i7  computer hardware  is not working and why all of a sudden the  USB port inside the ACER Aspire R15 i7  computer hardware is not working

ANSWER

Go into  "Device Manager"  and  then search for  "Universal Serial Bus controllers"  make sure that  ALL the  USB-related  devices are  ENABLED   as  shown   here  .   After that  the  "Human Interface Devices"  which is part of the   "Device Manager"   will show the presence of the   "HID-complaint  touch screen"  as shown here .   It seems to me that  this happens simultaneously  when   ALL  the  USB-related devices  are   ENABLED  in the   "Universal Serial Bus controllers".   As a result of that ,  now the   "Touchscreen"  mode of the  ACER Aspire R15 i7  is working and the   USB port  of the  ACER Aspire R15 i7 is also working , too.