Wired and wireless internet not working, and more...

[HP2]

My PC is plugged on the same modem-router and works fine (Internet is not slow anymore). The 3 tablet connected by Wifi to that modem-router works fine too.

I went to McDonald today with the laptop and it couldn't access internet on the McDonald's wifi either.

[SuperDave]

Are you certain that the internet switch on the laptop is not turned off?

[HP2]

Pretty sure, because Bitdefender and Windows Update have access to internet

[jason2074]

Try safemode with networking and or removing Hamachi from your system.

[HP2]

Thank you jason2074 for your reply! 

Safe mode with network doesn't work. I removed Hamachi, but still the same.

[jason2074]

What was Babyware Paradox for? I'm Not familiar with the software.

[HP2]

Babyware is a software related to security system, but I don't know exactly what it is for. My dad uses it.

I'm suspecting a Windows corruption. I think I'll re-install Windows and everything...  It seems to be the only solution

[SarahMaurer]

I unistalled the device and his driver, then install back. The warning icon is gone ("This device is working properly"), but still no internet access 

[jason2074]

Have you tried this MS article? if its of the same case with your computer? If yes, please backup the registry or read How to back up and restore the registry in Windows from the given link.

[HP2]

I don't find the "Windows Setup tab"... 

It is not exactly the same case with my computer, but I want to give it a try anyway, since my next step is to format

[SuperDave]

Your could also try a repair install.

[HP2]

I did a repair install. So now everithing is fine!

Thank you Jason2074 and SuperDave for all the time you took to help me!