Cannot connect windows 7 laptops to WiFi with 802.1x PEAP

Hi there, i am hoping someone can help shed a little light onto a small issue i have come across when setting up 802.1x authentication for our WiFi.

I work within a school and in the process of setting up a SSID for students. I have done all the VLAN'ing and setup up a radius server which all seems to be working fine on a user/password / permission level. When i try to connect with my mobile using my typical username and password, i can connect fine etc.

When i try to connect on a windows 7/10 device, i just get the troubleshooting message and it doesn't connect. I know there is a work around where you have to add the wireless network manually and tell it not to use the laptops default login credentials, although this is not ideal as i do not want to be doing this for every student's personal device.

Has anyone ran into this problem before and managed to figure out whats wrong? Any help right now would be awesome as i must have spent an easy 2 weeks on this, trying to get it to work.

Thanks!