I updated from studio 2.2 to 2.3 and here the emulator appears showing "Android is starting" and at various numbers of for example "Optimizing app 22 of 45." it freezes.
Restarting is not possible as I can not terminate "qemu-system-i386.exe" (access denied).
I already uninstalled the emulator version 26 (version 25 had the same problem) with SDK manager (even undeleted ...\AppData\Local\Android\sdk\emulator) and reinstalled it and did a lot of other things but nothing helps. Any ideas how I can debug the problem (can I set a longer timeout anywhere if that would be the reason) ?