Steve, Glad to hear. Welcome back. Remind me not to get a Kensington Mouse! I would absoultely go nuckin futs without PMDG.Philip

Steve, I know I did not have much to say as I was wracking my brains out to help you before I posted anything! I almost purchased a Kensington mouse. I am sooooooooooo glad I did not!!!! Anyway, I am happy for you. I know how it feels to be without the PMDG737. I had system problems causing bad performance with the 737 up until a few months ago when I changed Hard Drives and did a transfer, then all was good. Best regards, moss1

>It was that bloody driver for the mouse. Kensington MouseWorks>6.11.This was definitely a problem you would not find in any technical resource I was urging you to read. Congratulations.Michael J.WinXP-Home SP2,AMD64 3500+,Abit AV8,Radeon X800Pro,36GB Raptor,1GB PC3200,Audigy 2

Thanks everybody again.On a final note: I used my Kensington for a long time with every kind of software and no problems.I still use it but with no Kensignton software. That way it behaves just like an ordinary mouse. (It's actually a Trackball)And I found out that's it's FS9 itself that seems to have a problem with MousWorks 6, not just FSUIPC or PMDG.Because I complained that all the dialog windows in FS9 were very sluggish. When I choose a new location (airport) and pressed 'ok' it took FS9 almost a minute(!) to come back. I still could fly all the default FS9 planes ok.Anyway..... glad it all works. Now I can go and install the rest of my scenery, etc...cheers,Steve