Windows 7 loses all network connectivity after screensaver is disabled

Question

I have a very strange problem:
My Windows 7 laptop is set to show the default windows screensaver after 10 minutes. No matter how long the screensaver is active, the network connections are fine. I know that, because I listen to an online radio all day and it keeps playing, even after the screensaver kicked in.
But: When I return to my laptop and move the mouse to disable and return my work, all network connections drop for a short time. They automatically restore themselves within seconds, but all connections are lost (VPN, Online radio, Putty, ...).
I already tried to change power saving settings, so the network connections are not disabled, but that didn't help and honestly, that was already a desperate deed, because it wouldn't make sense to disable the network cards to save power not when the computer is unused, but when the computer is used again...
Any ideas?

Uğur Gümüşhan · Answer

I suggest trying to uninstall all power management bloatware first.

A VPN exchanges public keys and renew public keys many times, so when you continue using pc after screen saver, you may need to connect to the VPN again. So I'd like to know if it also happens on a normal network, and not only VPN.

You can disable windows power saving on a wireless adapter in device manager by deselecting the checkbox.

Another option is to change power management settings of current plan. I suggest disabling power saving on wireless networking.

If none works, you can try disabling the screen saver and using turning off monitor as a power saving method.

Windows 7 loses all network connectivity after screensaver is disabled

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