Windows automatic updates

A few days ago Fsx started to take 10 to 15minutes to load terrain data and start the flight which became rather annoying. I did the usual things backed off all the sliders in settings unchecked all extra addon scenery used back up cfg nothing worked. I checked CPU usage with FSX running and it was at 100%, I had noticed that around this time of the month fsx had slowed down and checked processes running which seemed ok, anyway the bottle neck turned out to be Windows automatic updates which was hogging the system, I don't know why windows needs so much of the resources for updating. Windows finally updated 7parts and then 2 more parts and now everything is back to normal reinstated everything setting back to original settings load times from clicking fsx icon to being at the airport just over 60 seconds and Cpu usage with fsx running 15 to 20%. I'm happy again and going to disable automatic updates for windows and do it manually.