Arduino IDE 1.6.6 "hangs" for up to a minute or more when starting on Win 10 on a MS Surface Pro. It ALSO hangs for a long time on any file save, any file open, and on closing. It hangs up on running Tools, or when compiling or uploading a sketch. This is intolerable. Following comments found in some earlier threads, I ran with the suggestion to turn off Bluetooth. However, that did NOT solve the problem -- it still hung! Furthermore, both the MS Wedge mouse and the MS Stylus pen run off Bluetooth, so de-activating Bluetooth hobbles my use of the Surface. I finally discovered that putting the Surface into full Airplane Mode (which deactivates both Bluetooth and WiFi) was a workaround, and it eliminated all the lengthy hang-ups. However, you not only lose mouse and pen input this way, but also any Internet connectivity! WHY CAN'T SOMEONE FIX THIS ISSUE, once and for all?!? One or another version of this problem has been around for years, it seems. Or perhaps someone more expert can suggest a more practical workaround than going into full Airplane Mode? I could really use some help, here, and I am certainly not alone!