Right-click clumsy.exe and select Run as administrator . If prompted by Windows User Account Control (UAC), click Yes to grant network interception permissions. Step 4: Configuring Filters and Functions

If you share more context (what the tool claims to do, where you saw it), I can help you track down a safer alternative or confirm if it's fake/malicious.

(commonly searched alongside stable builds like 0.3) is an open-source Windows utility designed to artificially degrade network conditions in a controlled, interactive environment. By leveraging the WinDivert kernel driver, Clumsy intercepts live network packets, alters them based on your parameters, and releases them back into the system stack.

If Clumsy fails to start, ensure no other packet-capturing software (like Wireshark) is conflicting with it. Reinstalling the WinDiver driver included in the folder often fixes this.

— Enable Throttle and Duplicate impairments to see how a voice or video call application handles jitter and out‑of‑order packets. Verify that the application’s jitter buffer and error concealment algorithms perform as expected.

Clumsy does not use a traditional setup wizard. It operates as a portable application backed by the WinDiver network driver. Open the folder where you extracted the Clumsy files. Right-click on clumsy.exe and select .

Improved capacity to simulate bandwidth throttling. Clumsy 0.4 v2 Install & Download Guide

: Because Clumsy intercepts system-level network traffic, it must be run with Administrator privileges . Simply double-clicking the icon might work, but it often fails to capture packets. Always right-click clumsy.exe and select Run as administrator .

: The tool refuses to launch or crashes immediately.

Adjust parameters in real-time if necessary. Clumsy updates packet manipulation rules instantly without requiring a restart.

You can write targeted rules in the text field using standard WinDiver syntax:

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