The automatic upgrade to Windows 10 build 10162 broke stuff.
Fingerprint reader - broken
First reboot after upgrade - machine froze
Second reboot after upgrade - sound broken (another rebooted fixed it)
Explorer link pinned to taskbar - broken
Theme changed - annoyance
This is on a Thinkpad T500.
I hope this is something that will be improved significantly.
EDIT: At least the VPN interaction is somewhat improved. At least clicking on it takes you to the VPN subtab of settings now. I'd still rather have the connect/disconnect button directly on the network popup though, like in Windows 7.