Just as a follow up, Davis VP2 and weatherlink 5.93 installed, using a virtual serial port program thats happy with wind 7 64 bit and USB version with serial port activated. All working well, running weatherlink and WD at the same time. Both programs update data when computer re boots, although sometimes WD has a little spit and doesn’t update data but you can generally go into control panel, reset the time to reload from and on the next reboot of WD it loads the missing data. :o)