Internet connection lost when restarting the computer

Hello everyone.
I live in Denmark, and 6 days ago I bought a new TOSHIBA pc: a Sattelite L855D-100. From the very start there has been a problem with the wireless internet connection. When I restart the pc, the internet connection is gone afterwards, and I am not able to re-establish the connection in any possible way. I have to shut down the pc - wait a few seconds - and then start the pc in 'normal' way. Then the wireless internet connection is okay.
But the problem is the same every time I restart the pc.
Does anyone know how to solve this problem?
I thank You in advance for Your help and advice.
Best regards Svend in Copenhagen.

Satellite L855D-100 (PSKAYE-003004DU) <- Netherlands version
A brand new computer should work right off the shelf, Svend.
I would restore the hard disk to its original out-of-the-box contents using Toshiba recovery media just once. And then return it for a new one if things are still not working right.
See the section System Recovery, which begins on p. 4-16 of the User's Manual (attached).
-Jerry
Attachments:
L855UsersManual.pdf ‏5612 KB

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