Why has d-link changed to unsecured?

[ericthemini]

We have 3 pc's in the house all connected wifi to virgin broadband, all worked fine untill i moved the router when i put a new unit under it to stand on. We then had tea and when we came back to go online our secure network has gone and had been replaced by an unsecured network simply called D-link!
I reset the router by holding in the button on the back but its still the same.
Can someone please tell me how to get it back as it was b4 or explain what happened.
Please keep it simple as not much know how on this sort of thing.
Thanks

[Buenchico]

This isn't my specialist field either, but this should get you started:

Type 192.168.0.1 into your browser's address bar (and click 'Go'). That will take you into your router's settings. You'll be asked to enter your password and username (for your router) but, if you've not previously configured them, those fields can be left blank.

From there you should be able to review your settings and, if necessary, change them to meet your requirements.

Chris

[ericthemini]

Thanks Buenchio, that got me in to the settings and after some mucking about its fixed! Top man.
Many thanks

Still left me wondering why this happened in the first place