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Welcome to Microsoft Community.
WAN Miniport IKEv2 drivers are included with Windows and should not require separate downloading. If you need to reinstall or update the drivers, performing an in-place upgrade of Windows can be the most direct and effective way. This process reinstalls Windows without affecting your personal files, apps, or settings. But it is still recommended that you back up your important files in advance, just in case:
How to perform an In-place Upgrade with Windows 10 Step-by-Step Guide - Microsoft Community
Yuhao Li
Microsoft Community Technical Support