Hey,
I solved the problem by realizing that the modem isn't able to find itself an IP-address, so you have to do it yourself in the windows options.
- Go to Control Panel, search for "Control panel"
- Navigate to "Network and Internet" -> "Network & Sharing Center"
- On the right sidebar, you will see "change adapter settings", go there.
- There you will see a few devices, open the one that has a greyed text: "Remote NDIS based Internet Sharing Device" (some text probably cut out).
- "Properties" -> Select Internet Protocol Version 4 (TCP/IPv4) by clicking it -> "Properties"
- Click on "Use the following IP-address:" and fill in these values.
IP-address: 192.168.1.100
Subnet mask: 255.255.255.0
Default gateway: 192.168.1.1
these DNS-servers are google Public DNS, you can use your preferred one, if you want.
Preferred DNS server: 8.8.8.8
Alternate DNS server: 8.8.4.4
And check the tickbox that says "validate settings upon exit."
- Click OK and it should work wonders after this.