• Open Control Panel → Security → Windows Firewall and make sure it is turned ON for all network profiles (Public, Private, Domain).
• Use Advanced Settings (wf.msc) to set outbound rules — block all outbound by default and whitelist only the apps you trust. This stops rogue processes phoning home.
• Disable any inbound rules you don't need. Remote Desktop, File & Printer Sharing, and Remote Assistance should all be off unless you actively use them.
• Set your home/work network profile to Private and any coffee shop / hotel Wi-Fi to Public — Public blocks almost all inbound connections automatically.
• Run netstat -an in cmd.exe periodically to see what ports are listening and make sure nothing unexpected is open.

• Use a VPN on public Wi-Fi — non-negotiable. Vista's unpatched network stack is an easy target on open networks.
• Vista supports PPTP and L2TP/IPsec natively. L2TP/IPsec is the safer of the two. Avoid PPTP if possible — it's considered cryptographically weak.
• For a modern option, OpenVPN (version 2.4.x or earlier Vista-compatible build) is a solid choice and still receives definition updates.
• Self-hosted WireGuard is ideal if your router or a VPS runs it — but WireGuard's native client doesn't support Vista; you'd need a Windows 7–era compatible tunnel tool or OpenVPN as the exit.
• DNS-over-HTTPS isn't natively supported on Vista, so configure your VPN's DNS or use a local DNS resolver like Simple DNSCrypt (old version compatible with Vista).

• Disable SMBv1 — it's on by default in Vista and is the attack vector behind WannaCry and related exploits. Go to Control Panel → Programs → Turn Windows features on or off and disable "SMB 1.0/CIFS File Sharing Support". Or run: sc config lanmanworkstation start= disabled if you don't need file sharing at all.
• Disable Remote Registry service (services.msc → set to Disabled).
• Disable Telnet and FTP client features unless you specifically need them.
• Turn off NetBIOS over TCP/IP in your network adapter's advanced settings → WINS tab.
• Consider disabling IPv6 if you don't use it — older stacks have less hardened IPv6 implementations.

• uBlock Origin — the gold standard ad and tracker blocker. Stops a huge category of malvertising attacks before they even load.
• HTTPS Everywhere (or enable "Always use HTTPS" in Supermium flags) — forces TLS on sites that support it.
• Privacy Badger — blocks third-party trackers that uBlock might miss.
• Enable Safe Browsing in Supermium's settings (Settings → Privacy and Security → Safe Browsing). It uses Google's phishing/malware list.
• Disable JavaScript on untrusted sites using uBlock's per-site controls, or the built-in content settings.
• Never install Flash, Java browser plugins, or ActiveX — these are historically the #1 browser exploit vector. They're dead, leave them dead.

• MSE 4.4 is the last version compatible with Vista. It still receives signature (definition) updates from Microsoft as of 2025/2026, though Microsoft has not committed to a hard end date.
• Download from Microsoft's official site. After install, manually run Windows Update to get the latest definitions.
• Schedule a full scan weekly — set it in MSE's scheduled scan settings to run at an off-hours time.
• MSE integrates with the Windows Security Center and gives you a tray icon — keep it green!
• Limitation: MSE's heuristic detection is Vista-era. It will miss many modern threats that rely on post-Vista techniques, so treat it as a baseline, not a complete solution.

• ClamAV is maintained by Cisco Talos, is cross-platform, and the Windows build (ClamWin GUI wrapper) works on Vista.
• Its signature database is actively updated — latest stable is 1.5.1 (Oct 2025). Run freshclam regularly to pull new definitions.
• ClamAV is primarily an on-demand scanner — use it for scanning downloaded files before opening them.
• Detection rates are decent (~75-80% in tests), but it lacks behavioural / heuristic detection. Best used as a file scanner before you open anything downloaded.
• Set up a right-click context menu scan in ClamWin so you can scan individual files before opening.

• Malwarebytes: Version 3.5.1 (Premium, old) still provides definitions for Vista users as of 2025. Newer versions won't install. Useful as a secondary on-demand scan but the definitions are several years behind modern malware. Optional, not essential.
• Norton, Avast, Kaspersky, Bitdefender: All have dropped Vista support. Don't try to install current versions — they may partially install and break things.
• Windows Defender (standalone): Superseded by MSE on Vista. Don't use the old standalone Defender alongside MSE.
• No antivirus can fully compensate for Vista's unpatched kernel. Your best antivirus is not running Vista on untrusted networks and not opening unknown files.

• Keep UAC fully enabled — do not disable it, no matter how annoying the prompts are. UAC prevents apps from silently escalating to admin privileges.
• Create a standard user account for day-to-day use and keep your admin account separate. Most malware assumes it's running as admin — a standard user account breaks many attack chains.
• When UAC prompts appear, read them carefully. Prompts on the Secure Desktop (screen dims) are genuine Windows prompts — a prompt that doesn't dim the screen is suspicious.
• Disable the built-in Administrator account if it's enabled: net user administrator /active:no
• Use a strong password on your admin account — minimum 14 characters, mixed case + symbols.

• BitLocker is available on Vista Ultimate and Enterprise editions only. If you have one of these, use it — it encrypts the entire system volume with AES-128 or AES-256.
• Requires either a TPM 1.2 chip or a USB key to store the startup key. If your machine has a TPM, Vista will detect it automatically.
• Store the recovery key somewhere safe and offline (paper backup in a safe, or a separate encrypted USB).
• BitLocker protects against physical theft and offline data extraction — an attacker who steals your hard drive gets nothing without the key.
• For non-Ultimate editions, consider VeraCrypt (an old Vista-compatible build) to encrypt sensitive folders or containers instead of full-disk encryption.

• Disable Autorun/AutoPlay for all drive types — this was a major malware vector in the Vista era (USB worms). Set via Group Policy: gpedit.msc → Computer Config → Administrative Templates → Windows Components → Autoplay Policies
• Disable Windows Sidebar / Gadgets — these have multiple known vulnerabilities. Right-click desktop → uncheck "Show desktop gadgets".
• Uninstall or disable Internet Explorer as a browser component via Windows Features (though keep the DLL stack as removing it breaks many things).
• Disable Windows Scripting Host if you don't use VBScript/JScript automation: regsvr32 /u wscript.exe — this blocks a common malware execution vector.
• Disable secdrv.sys (SafeDisc DRM driver): sc config secdrv start= disabled — it has a known privilege escalation exploit.

The Vista Extended Kernel by win32ss backports Windows 7/8/10 API calls to Vista, allowing some modern apps to run. The original Extended Kernel is no longer receiving updates, but a successor called Second System is in active development as of 2025.

• Note: sandboxing features of Supermium are disabled under the original Extended Kernel. Since Supermium v119 doesn't require Extended Kernel for Vista SP2 x64, skip Extended Kernel for better security when just needing a browser.
• Only use Extended Kernel / Second System if you genuinely need an app that requires it, and accept the reduced sandboxing trade-off.
• Source: win32subsystem.live/extended-kernel