Hello,I'm doing some software work on my simulator and would like to know what the NTVDM.EXE (16 bit virtual machine) module is running in my fs9.1 sim. There seem to be times when it is using VERY HIGH % of the CPU. I first noticed it when running my FS-1/Dreamfleet Bonanza. I had FSNAVIGATOR on a second screen and the only thing in the Bonanza that I could think of was the Reality XP 430/ 500 Weather Radar that is part of the add-on.I have been getting some CTD's when I use my network computers for other addons like RC3.1 or QUICKMAP.I am running a very quick machine (MONARCH - ATH 3500+, 1 GIG of ram and two NVIDIA 6800 ULTRA's. I am using XP and no virus protection when the sim is running.Thanks in advance,Ron SagelNear KCHS

NTVDM is used to drive the Reality XP GPS.-jim

Thank you,Ron Sagel