Couchbase 4.5 (2601) on Windows 10 Anniversary update Is not starting correctly

I tried to Install Couchbase 4.5.0 on my laptop which is already upgraded to Windows 10 Anniversary update (14393.67)
After the installation I couldn't start the WebUI.
I restarted and everything seems to be back to normal with the initial node setup.

afterward I logged on to the UI, after a second - the UI reverted back to the login screen.
the service is "running" but I can't use the UI or connect to the buckets.
when I try to use cbworkloadgen - the error message I get is that the connection was forcibly closed by remote host.

when I check the bucket status with GET /pools/default/buckets/default
I get that the bucket is stuck in warmup status.

Thanks,
Roi.