Ext2FSD works fine on Windows 10 for me, though I have seen problems reported. You have to start it manually, it doesn't autorun. Open the program, start the service and then plug in the USB drive: hit 'refresh' if you don't see the drive listed. The drive should be listed as 'ext3'. If not you have a problem: try ejecting and reloading. There are good, free, alternatives to Ext2FSD like this one from Paragon you could try if you are still having problems.
BTW, even though the drive doesn't show in My Computer, it does show up as a choice when you eject disk. So, it is seeing the drive at a low level, right?