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Maybe check if the problem could be caused by an --> adware, etc...?

Download this utility --> AdwCleaner
and place it on the desktop.
Run it as administrator and click on delete.

Restart the pc.

Download and install --> MalwareBytes
Run it as administrator
Update the product
Run the quick scan.
If positive, delete the detection.

Post the 2 reports in your next message.

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Human beings are at their best when things are at their worst.

Hello,
could you specify whether you are on Wi-Fi or Ethernet?

Good evening,

try performing a system restore to a date prior to the issue.

Windows 7

http://www.chantal11.com/2010/05/restauration-systeme-a-une-date-anterieure-windows-7-8-10/

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Kind regards, exla

Good evening,

on the PC that cannot connect, click on Start => Run => type CMD
a window will open, type ipconfig /all

Note, there is a space between the g and /

then take a screenshot and attach it to your next message.

To attach a screenshot, it's a print screen on the system or; screenshot, to do this, just press the fn key and the system print screen key on the keyboard (for a laptop) or the print screen key (for a desktop). Select the page on the screen, press the key or keys, then open a photo editing software, you have Windows Paint which does it. Open the photo software, then click on new project, then edit, then paste. The screenshot will appear, save it in a folder in jpg format.

then put it on your USB drive, then go to this site

https://www.casimages.com/

click on browse, select your photo, click on confirm, copy the link that will be given to you, and paste it in your next message.

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Best regards exla