I am Using the 64 Bit Calibre in WIn 7 64 Bit Ultra..
Before now, I put the 32 Bit Calibre in Startup and worked OK..
When I Put the 64 Bit Link In startup Calibre dISSAPEARS AND DOES NOT START CALIBRE..wHEN i tuRN ON Laptop in AM..
I start every Day with Calibre..
Gordon L , Media., PA usa..