How to Empty the Cache for NPCScan


The "World of Warcraft" add-on NPCScan detects rare monsters and alerts you to their presence, making it easier for you to hunt them down and slay them for their valuable loot. NPCScan draws from WoW's cache file, determining which monsters to highlight based on if you've encountered them already or not -- monsters already encountered are ignored instead of highlighted. Clearing WoW's cache file will also reset NPCScan, enabling it to once again alert you to the presence of rare monsters you've already encountered in your adventures.

  • Sign out of "World of Warcraft" and completely close both the game and the launcher. To ensure the game is completely shut down, press "Windows-X," select "Task Manager" and end the "Agent.exe" process from the processes tab. To prevent issues within the game itself, you must close it before emptying the cache.

  • Press "Windows-X" to launch the Power User menu and select "File Explorer" if you're using Windows 8. If you're using Windows 7, click the Start button and select "Computer" from the list.

  • Navigate to the following file path:

    C:\Program Files (x86)\World of Warcraft\

    NPCScan doesn't keep its own cache, so you don't need to track down NPCScan's own folder inside the WoW folder.

  • Delete the "Cache" folder. Deleting the cache is perfectly safe, as it will be rebuilt by the end of this process.

  • Restart "World of Warcraft" and the game will automatically begin rebuilding the cache. After refreshing the cache, rare monsters encountered in the past are no longer flagged, meaning that they will trigger NPCScan alerts once again.

Tips & Warnings

  • If you're using Windows 7 and the cache hasn't cleared after following the above steps, WoW might be using one of the other caches it sometimes creates. Enable the ability to view hidden files and folders and navigate to the following folder: "C:\Users\<YourAccountName>\AppData\Local\Virtual Store\Program Files." If there's a "World of Warcraft" folder there, delete it.
  • Another cache file can also exist in the public user's app data folder. Navigate to and delete the following folder: "C:\Users\Public\Games\World of Warcraft\Cache"
  • Before "Warlords of Draenor," you could also configure NPCScan to automatically trigger alerts for specific non-rare monsters. Changes in the way rare monsters are flagged in the system means that this is no longer possible. However, NPCScan does feature a new keybind-based system you can use to target specific monsters using a button press when you're in the zone, making it easier to track them if they're up.
  • NPCScan is particularly useful for Hunters trying to track down rare monsters to tame as pets. Rare, tameable beasts are typically sought after by Hunters for their abilities, unique visual appeal or rarity. This makes competition for them fierce in some cases, making NPCScan a valuable asset in tracking and taming a monster first.
  • NPCScan doesn't differentiate between living rare monsters and dead ones. If you come across a rare monster you're hunting only to find it dead, wait until its corpse de-spawns and immediately clear your cache. If you don't, NPCScan won't alert you when it does spawn again, since you've already "seen" the monster -- even though it was dead as a doornail when you first saw it.

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