Thank you for posting your query in Microsoft Community.
From your description, it seems that you are unable to connect to the wireless network using Samsung Series 3 - NP355V5C-A03CA laptop.
I will be glad to assist you.
I would appreciate if you could answer the following questions:
1. Have you made any recent changes to your computer?
2. Which antivirus application are you using?
3. Did you try to connect to a wired connection?
I would suggest you to follow the steps provided below and update us on the status of the issue.
Wired and wireless network problems:
Why can't I connect to the Internet?:
For any Windows related issues please feel free to contact us and we will be glad to help.
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