I installed XP Mode on this machine to run older software that can only run on XP. I have a 6530 and it runs with no issues in XP Mode. The device is a USB to serial converter that shows an error every time I try and attach it to XP from Windows 7. I also notice that due to end of life with XP that Dell did not create drivers for XP for the 6540. Am I missing something or will XP mode not fully function on E6540 and later laptops? Thanks, Aaron