Running on an Inspiron 1521 with Win7 64-bit Home Premium. I gave Win10 a week, then rolled it back to the original Win7. Everything is working EXCEPT I have no network connectivity. Network center recognizes my home WiFI network, but connection attempts result in "limited connectivity" (read: no usable connection). Control Panel - Device Drivers - properties of the various drivers show they are all "operating correctly".
Also working this issue on answers.microsoft.com. They suggest 1) "rollback is not a good idea" and 2) "reinstall device drivers".