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how do you do it? Thanks

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This thread asked how to disable IPv6 on Vista x64. The original question came from , pointed to a community how‑to, and referenced Microsoft's article on disabling particular IPv6 components. The notes below complement those links with practical, safety‑first guidance.

Fully disabling IPv6 is usually unnecessary and can cause subtle problems because Windows uses IPv6 for internal networking. Confirm whether IPv6 is actually in use on the affected machine by running ipconfig /all and looking for fe80:: (link‑local) or global IPv6 addresses. For a quick test, disable IPv6 only on the problem adapter: open Network Connections, view the adapter's Properties, and uncheck "Internet Protocol Version 6 (TCP/IPv6)"; then restart the adapter. For broader or permanent changes, follow Microsoft's documented registry options but always create a System Restore point and export any registry keys before editing. Updating the NIC driver first is a low‑risk step that often fixes issues without disabling protocols.

If connectivity breaks after changes, revert them immediately, then run ipconfig /flushdns and ipconfig /renew, reinstall the NIC driver if needed, and restore the registry or the system image as required. Keep in mind some Microsoft networking features expect IPv6. Because Windows Vista is no longer supported, consider upgrading to a supported OS for better IPv6 handling and security.

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Hi, refer this please: http://support.microsoft.com/kb/929852 (Title: How to disable certain Internet Protocol version 6 (IPv6) components in Windows Vista, Windows 7 and Windows Server 2008)

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