Open Command Prompt as Administrator and run:
regsvr32 "C:\full\path\to\loader64.dll"
(Replace with your actual path). This forces Windows to re-register the DLL in the registry.
Ubisoft’s DRM acts similarly to malware in behavior—it injects code into the game process to verify ownership. Aggressive antivirus software (like Avast, AVG, or even Windows Defender) often falsely identifies loader64.dll as a Trojan or a generic PUP (Potentially Unwanted Program). When the AV quarantines it, the game cannot find the file, triggering the error. assassin 39-s creed valhalla uplay r2 loader64.dll
If you own a legal copy of Assassin's Creed Valhalla, follow these steps in order. Do not download DLL files from random websites.
Only if the file exists but isn’t registered: Open Command Prompt as Administrator and run: regsvr32
This point is sensitive but necessary. The uplay_r2_loader64.dll is a DRM file. If you have attempted to use unofficial cracks, mods that bypass the launcher, or downloaded the game from unauthorized sources, the file may have been intentionally removed or replaced. Even legitimate mods that modify the loader can trigger this error.
Few things are as frustrating as settling in for a long session of raiding in Anglo-Saxon England, only to be met with a cryptic system error instead of the iconic title screen. For many PC players of Assassin’s Creed Valhalla, that moment of dread comes in the form of a pop-up referencing a highly specific file: “uplay_r2_loader64.dll” . (Replace with your actual path)
The full error often reads:
“The program can’t start because uplay_r2_loader64.dll is missing from your computer. Try reinstalling the program to fix this problem.”
Sometimes, the error is tied directly to the game’s executable, reading: “Assassin’s Creed Valhalla - Uplay R2 Loader64.dll Error.”
This article dives deep into what this file is, why this specific error occurs, and—most importantly—how to fix it permanently so you can return to your Viking saga.