ProtonVPN Windows Client New Version Update Notes
Table of Contents
A long-standing pain point reported by Windows users was that the connection handshake occasionally lagged during peak hours, and the interface felt cramped on low-resolution laptops. ProtonVPN's mid-September Windows client update targets these two issues directly, while also enhancing the Kill Switch response mechanism.
Core Changes in This Update
The new version reworked the connection flow, cutting WireGuard's handshake time by nearly 30%. Previously, from clicking "Quick Connect" to establishing the tunnel, users waited about 2.8 seconds on average; after optimization, the median dropped to around 1.9 seconds. The developer also refactored the server list rendering, eliminating scroll stuttering, and adjusted fonts and spacing for 125% and 150% scaling.
WireGuard Performance Optimization
WireGuard is known for being lightweight and efficient, but client-side encapsulation and handshake scheduling still had room for improvement. The new version improved concurrent handling of key handshakes, noticeably speeding up reconnection in weak network conditions. In a simulated network with 5% packet loss, reconnection success rose from 91% to 98%. For gamers and mobile workers frequently switching Wi-Fi, this means less downtime waiting.
UI and Security Improvements
Beyond performance, security details were also enhanced. The Kill Switch's network-cut response on unexpected VPN drops was further compressed from millisecond-level, and a fine-grained "disconnect only non-system traffic" option was added, allowing users to maintain intranet access while cutting public exposure. NetShield's rule library was also updated with over a thousand new malicious domain blocking rules.
Upgrade Guide and Data
This is an incremental update. Existing users can restart the client to auto-detect the upgrade; new users can get the full installer via free VPN download. Officials recommend all Windows users upgrade promptly for more stable connections and better security.
| Metric | Old Version | New Version |
|---|---|---|
| Handshake time (median) | 2.8s | 1.9s |
| Weak-network reconnect rate | 91% | 98% |
| Kill Switch response | Millisecond | Further compressed |
| Update Item | Description |
|---|---|
| WireGuard optimization | Improved handshake concurrency |
| UI refactor | Server list rendering optimization |
| Kill Switch enhancement | New fine-grained option |
| NetShield update | 1000+ new rules |
A long-time user reported in the community that after upgrading, "switching Wi-Fi barely feels like a drop." A gamer noted that ranked matches no longer suffer brief packet loss from reconnecting. These real-world feedbacks align with lab data.
"The most tangible part of this update is the handshake speed — reconnection in weak networks is nearly seamless." — Veteran Windows user
User Reviews
"Noticeably faster connection after the update, and the UI looks much better on high-DPI screens."
"The new Kill Switch option is very practical — more flexible network protection."
"Weak-network reconnection is stable now, no more random packet loss in games."
From faster handshakes to fine-grained network protection, this update polishes the stability Windows users truly care about, without piling on gimmicks. All Windows users should upgrade now, or download the latest client via the free VPN download link.
