Problems with DNS in Hyper-V VM

I am having issues with my internet connection in my Hyper-v vm. I am following a guide from critical path to install a sharepoint 2013 dev-env on my hyper-v vm with windows server 2012 as os but something is weird. Sometimes I have internet and sometimes not (most of the time I do not have internet). I dont know anything about these issues but when I troubleshoot my internet connection it says that my dns server isn't responding. I have followed the guide and have an internal network connection and one external and the following settings for my connections:

INTERNAL:

In the Internet Protocol Version 4 Properties dialog, select the option Use the following IP address and enter the following configuration settings:
i) IP Address: 192.168.150.1
ii) Subnet mask: 255.255.255.0
e) In the Internet Protocol Version 4 Properties dialog, select the option Use the following DNS Server Addresses and enter the following configuration setting:
i) Preferred DNS Server: 192.168.150.1

EXTERNAL:

i) Select the radio button option Obtain an IP Address Automatically
ii) Select the radio button option Use the following DNS server addresses.
iii) Set the Preferred DNS Server to 127.0.0.1.
iv) Set the Alternate DNS Server to 4.2.2.4.

Help me?