wintun.sys
WireGuard — Wintun virtual network adapter
When blamed in a crash: Very likely the true cause
What to do
The modern virtual adapter used by WireGuard and many commercial VPNs.
- Update the VPN client that installed it.
- Remove unused VPN clients — multiple wintun instances from different apps can conflict.
Official download (the vendor's own site — never use third-party "driver download" sites):
https://www.wireguard.com/install/
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