A Windows 10 machine that works perfectly can become a sieve in just a few weeks if a support deadline is missed or if a network setting is neglected. Securing and optimizing an operating system is not about piling on protection software: it’s about keeping a foundation updated, reducing the attack surface, and maintaining stable performance without sacrificing reliability.
End of Windows 10 Support: The Trap That Makes Any Optimization Obsolete
Since October 14, 2025, Windows 10 no longer receives security patches under standard support. Machines not enrolled in the Extended Security Updates (ESU) program remain functional, but each discovered vulnerability remains open indefinitely. You can optimize startup, lighten services, clean the registry: without a patch, the system remains exposed.
The ESU program extends coverage, but it is not a sustainable solution. Hardware manufacturers are beginning to follow suit by gradually reducing driver compatibility with Windows 10. This results in a system that accumulates hardware incompatibilities in addition to software vulnerabilities.
Before trying to speed up an aging machine, it’s wise to check if it can migrate to Windows 11 or a maintained Linux distribution. You can find Trucnet tips on Geek Flare to assess transition options and system settings suitable for each configuration.
Network Attack Surface: Securing Beyond the Workstation
Most guides focus on the user workstation (antivirus, password, backup). Field reports show that peripheral devices exposed on the Internet have become priority targets. Home or professional firewalls, anti-spam gateways, routers with administration interfaces accessible from the outside: attackers exploit known vulnerabilities, often patched for months but never applied.
In practice, we see compromises that never go through the Windows desktop. The attack enters through outdated router firmware, pivots on the local network, and then accesses file shares. The workstation’s antivirus detects nothing because the traffic is legitimate from the system’s perspective.
To reduce this surface, three concrete actions to take:
- Update the firmware of each network device (router, access point, NAS) at least once a quarter, checking the manufacturer’s bulletins
- Disable remote access to the router’s administration interface, or restrict it to a fixed IP if absolutely necessary
- Segment the Wi-Fi network by isolating connected devices (cameras, voice assistants) from the main network where sensitive data flows
These measures do not replace workstation protection, but they fill a blind spot that most users ignore.
Performance Optimization Without Compromising System Security
You often come across advice suggesting disabling the Windows firewall, turning off Windows Defender, or removing system services to gain a few seconds at startup. Disabling a layer of security for performance gains is a poor trade-off. The gains are marginal on recent hardware, and the risk increases disproportionately.
Optimization levers that do not sacrifice security are more targeted. On a sluggish machine, start by checking the startup programs via the Task Manager (Startup tab). Most slowdowns come from third-party software that launches in the background for no reason.
Cleaning Up Unused Applications and Managing Storage
A system cluttered with programs never used offers more attack surface (each installed software can contain vulnerabilities) and consumes resources. Removing unused applications reduces both the attack surface and system load.
For storage, the built-in Disk Cleanup tool in Windows or the Storage function in Settings is sufficient in most cases. Third-party registry cleaning software, on the other hand, poses more risks than benefits: feedback varies on this point, but more systems have been broken by aggressive registry cleaners than machines that were actually sped up.
NIS 2 Compliance and Executive Responsibility: What Changes for Professionals
For professional organizations, securing a system is no longer just a matter of good practice. The European NIS 2 directive, currently being transposed in France, expands the scope of organizations subject to cybersecurity obligations. Executives can be held personally liable in case of failure to implement protective measures.
Even for a small organization, this implies documenting the measures taken:
- Formalized password management policy (minimum length, renewal, prohibition of reuse)
- Backup procedure regularly tested, with at least one offline or offsite copy
- Log of updates applied to each workstation and network device
- Two-factor authentication enabled on all privileged accounts
These requirements align with the classic recommendations from ANSSI, but NIS 2 gives them binding force. Non-compliance exposes organizations to sanctions, not just technical risks.
A secure and high-performing operating system relies on a foundation kept up to date, a network where every component is monitored, and settings that do not sacrifice protection for a few seconds of convenience. The priority remains to check the support status of your OS before tackling fine-tuning: without patches, everything else loses its effectiveness.
