3.3.3.1 If You Have Windows XP 64, Manually Switch

Note: Microsoft Windows XP Professional SP3 is no longer supported. However, MPLAB X IDE may continue to function on this operating system.

If you are using Windows XP 64-bit OS on your computer, you will not be able to use the MPLAB Device Driver Switcher to switch from MPLAB IDE v8 drivers to MPLAB X IDE drivers; you will have to switch the drivers manually. See 3.3.3.4 If You Need to Manually Switch the Drivers.