Every launcher has its system file and if you have still had the previous launcher’s system file then it can interrupt Witcher 3’s functions and cause Witcher 3 not launching issues on your computer. This step is for those who changed their launcher from GOG to Steam and transferred the game files from one launcher to another. This process will take some time but it will fix any file issue and also resolve the Witcher 3 not launching on your system. Step 4: Next, click on the Local Files Tab and then finally click on Verify Integrity of Game Cache.
Step 3: Make a right-click on the game and then click on Properties. Step 2: A list of games installed on your system will be displayed where you have to locate Witcher 3. Step 1: Launch Steam and then click on the Library. This can be done by following these steps: A file check would help scan all the game files on your computer and replace the corrupted and outdated ones if needed. If one of these files gets corrupted, then it would prevent Witcher 3 from launching on your computer.
When you install Steam and download a game, it saves many files on your hard drive. Step 4: Relaunch Steam and try opening Witcher 3 to check if the issue has been resolved. Step 3: Click on Apply and then on the OK button. Step 2: Once the Properties window opens, select the Compatibility tab and then click the check box labelled as Run This Program as an Administrator. Step 1: Make a right-click on the Steam icon and click on properties. Here are the steps to open Witcher 3 game in Admin mode: One possible reason why Witcher 3 is not launching on your computer is that it is denied certain permissions and launching it in elevated mode is a quick resolution. Windows 10 provides users to run the third-party apps in administrator mode and thus empowering those apps to use system files and system resources.