Windows 11 has stricter security requirements than previous versions. For Vanguard to function properly, you must have the following enabled in your BIOS/UEFI: (Trusted Platform Module) Secure Boot
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| Issue | Frequency | Workaround / Fix | |-------|-----------|------------------| | (“System reboot required”) | Medium | Reboot, then check vgk.sys in Device Manager → View → Show hidden devices → Non-Plug and Play Drivers. Reinstall if corrupted. | | Secure Boot / TPM 2.0 errors | High (on custom builds or older BIOS) | Enable Secure Boot + TPM 2.0 in BIOS/UEFI. Some Windows 11 upgrade bypasses break this — clean install recommended. | | Blue screen (PAGE_FAULT_IN_NONPAGED_AREA) | Low | Usually caused by outdated BIOS or conflicting anti-malware (e.g., McAfee, Avast). Update BIOS and disable third-party AV real-time scanning. | | Performance dips after Windows update | Occasional | Run sc config vgc start= auto in admin CMD to ensure Vanguard’s user-mode service starts correctly after updates. | | Dual-boot (Linux/Windows) issues | Rare | Vanguard may flag modified bootloaders. Disable “Early Launch Anti-Malware” in Windows Security → Device Security → Core isolation → Microsoft Vulnerable Driver Blocklist. | Windows 11 has stricter security requirements than previous
