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Thank you for showing your interest in HP Support Forums. It is a great place to find the help you need, from other users, HP experts, and other support personnel. I see from your post that you are having issues related to HP notebook. Don't worry we'll work together to help you find a solution.
To provide you with an accurate solution, I'll need a few more details:
Have you recently made any software or hardware changes on the PC before the issue started?
Does this happen while connecting through battery or while using through AC adapter? If so, please go through this support link.
Do you get any blue screen errors when the internet disconnects and the computer crashes?
Did you recently update the windows or BIOS? (please do, if you haven't as it could solve the issue).
In the meantime, let's try these steps here:
Perform a Hard reset on the notebook:
Many startup errors and other problems can be resolved by decreasing the amount of power stored in hardware components. Decreasing stored power is sometimes referred to as a "Hard Reset". Use the following steps to perform a hard reset on a computer:
1. If Windows is open, click Start and then Shutdown.
If Windows is not open and the computer has power, press and hold the power button on the computer until the computer shuts off.
2. With the power off, disconnect the power cord from the back of the computer.
3. With the power off and the power cord disconnected, press the power button on the computer for 5 seconds. The power light indicator on or near the power button might turn on briefly but then go out.
4. Reconnect the power cord and turn on the power.
Let's try to check the power settings: In Device Manager, right click the wireless adapter and choose Properties. In the window that opens click on Power Management tab. Uncheck "Allow the computer to turn off this device to save power", Click on OK. Now check the connection.
Next thing, I would suggest here is to uninstall the wireless drivers from device manager:
Right-Click on start button> click device manager> Network adapters>then select the wireless drivers and right-click on it and uninstall the Wifi drivers.
Then restart the computer and check if you are able to go online.
I would suggest you go ahead and update the Bios, Chipset and Wireless card drivers on your PC from our HP support website, using this link.
Also, download and install HP support assistant on your PC. It should automatically download and install the latest updates and drivers for your PC.
Refer this link to know how to use HP support assistant.
Once done, restart the computer.
If the issue persists, I would suggest here is to Run a test on the wireless card from F2(Please capture the failure ID for further assistance).
Could you please respond to this post with the details and with the results of the troubleshooting as this will help me in further assisting you.
Eagerly waiting for your response!
that said, If the information I've provided was helpful,
give us some reinforcement by clicking the solution and kudos buttons,
that'll help us and others see that we've got the answers!
Good Luck.