Well I've been trying quite a lot of things, it worked to connect through my other laptop which is not given by my school so there's nothing wrong with the homegroup itself. But I need a way to connect this "domain owned laptop" into my homegroup. It has IPv6 working, all the services are started and I've also deleted idstore.sst without success.
EDIT: The error that comes up is "Windows cannot set up homegroup on this computer"
Checking through this: http://technet.microsoft.com/en-us/library/ee617166(v=ws.10).aspx