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Please note there are some issues that may cause Windows PC to crash. You can scan the qr code or get the link of the error message displayed on the blue screen to get the cause of the crash.
However, a VPN may cause Windows to crash due to several reasons. An improperly configured VPN, a buggy VPN client, traffic overload, poor internet connection, and a faulty driver can all trigger a VPN to crash or freeze Windows. In case you downloaded the OpenVPN from a secure site and did correct settings on then you need to check the network drivers.
The following are some of the fixes that can help you to resolve the issue. if the VPN causes your windows computer to crash or freeze.
Change your system settings to allow incoming VPN connections.
Update network drivers.
Run a malware scan.
Troubleshoot in Clean Boot State.
Before you begin, ensure that you have not misconfigured your VPN software. It is best to start with its default settings.