I have got a peculiar problem. I try to use Tor 5.0 with Windows 7. When I start Tor a Tor circuit is established and the Tor homepage shows up. Yet, I am unable to browse the web, as no webpages seem to load (not even the Tor update page). Disabling my firewall does not help. I am able to run Tor with Tails, so my there seems to be no problem with internet connection or provider. 

The Tor log-file seems fine to me:

[notice] Tor v0.2.6.10 (git-cab52fe998909e08) running on Windows 7 with Libevent 2.0.21-stable, OpenSSL 1.0.1p and Zlib 1.2.8.

[notice] Tor can't help you if you use it wrong! Learn how to be safe at https://www.torproject.org/download/download#warning

[notice] Read configuration file "C:\Users\alpha\Desktop\Tor Browser\Browser\TorBrowser\Data\Tor\torrc-defaults".

[notice] Read configuration file "C:\Users\alpha\Desktop\Tor Browser\Browser\TorBrowser\Data\Tor\torrc".

[notice] Opening Socks listener on 127.0.0.1:9150

[notice] Opening Control listener on 127.0.0.1:9151

[notice] Parsing GEOIP IPv4 file C:\Users\alpha\Desktop\Tor Browser\Browser\TorBrowser\Data\Tor\geoip.

[notice] Parsing GEOIP IPv6 file C:\Users\alpha\Desktop\Tor Browser\Browser\TorBrowser\Data\Tor\geoip6.

[notice] Bootstrapped 0%: Starting

[notice] Bootstrapped 80%: Connecting to the Tor network

[notice] New control connection opened from 127.0.0.1.

[notice] Tor 0.2.6.10 (git-cab52fe998909e08) opening log file.

[notice] New control connection opened from 127.0.0.1.

[notice] Bootstrapped 85%: Finishing handshake with first hop

[notice] Bootstrapped 90%: Establishing a Tor circuit

[notice] Tor has successfully opened a circuit. Looks like client functionality is working.

[notice] Bootstrapped 100%: Done

[notice] New control connection opened from 127.0.0.1.

[notice] New control connection opened from 127.0.0.1.

[notice] Owning controller connection has closed -- exiting now.

I am totally clueless, how to solve this problem. So, if anyone could give me a hint or point me to where I could find some help, I would be very grateful.

Regards, 
Roland