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Comment out the OSCTUNE line and have the configs set like this.


__CONFIG _CONFIG1L, _CPUDIV_NOCLKDIV_1L & _USBDIV_OFF_1L
__CONFIG _CONFIG1H, _FOSC_HS_1H & _PLLEN_ON_1H & _PCLKEN_ON_1H &...

Maybe??
http://www.microchip.com/forums/tm.aspx?m=488342

I know this will sound like I am beating the dead horse, but I still think it is a driver issue.

With the USB plugged in does it show up in device manager? If so, do the update driver thing...

Looks like we need more info.
Is the project a CDC or HID?
Hardware -- capacitor value on VUSB?
How often is the the USB serviced?
Version of PBP?

Posting the code will help.

Probably missing the driver.
Look in the PBP directory -- USB18-- for mchpcdc.inf
Copy that to the other machines.