How to Fix Unable to Initialize SteamAPI Error | Steam Not Launching Games | Games Not Launching

In this video, I'll show how to fix "Unable to initialize SteamAPI" error, an error which prevents Steam games from launching. This is a well-known error, and by following the video, you'll be able to fix Steam games not launching due to the SteamAPI initialization bug.

00:00 AppData Steam Files
00:25 Steam Config Flush
00:36 Steam Folder Attributes
00:56 Steam Folder User Permissions
01:07 Steam Folder Files
01:26 Windows Firewall Exception for Steam
02:04 Steam Compatibility Settings
02:19 Steam Download Cache
02:35 Steam Library Repair

This video contains many potential fixes to the problem of "Unable to initialize SteamAPI", which causes Steam to not launch games. Follow all of the steps in the video to make sure to fix this problem.

Right-click on Steam
Click on "Exit Steam"
Press the WINDOWS key or click on the WINDOWS icon
Write: Run
Click on Run
Write: %localappdata%
Click on OK
Open the Steam folder
Delete all of the files inside the Steam folder

Right-click on Steam
Click on "Exit Steam"
Press the WINDOWS key or click on the WINDOWS icon
Write: Run
Click on Run
Write: steam://flushconfig
Click on OK

Open Computer
Open Drive
Open Program Files (x86) [Unless you installed Steam on a different folder]
Select the Steam folder
Right-click it
Click on Properties
Uncheck the option "Read Only"
Click on Apply
Click on OK

Open Computer
Open Drive
Open Program Files (x86) [Unless you installed Steam on a different folder]
Select the Steam folder
Right-click it
Click on Properties
Click on Security
Click on Edit
Click on Users
Check "Full Control"
Click on Apply

Open the Steam folder
Delete all of the folders with the exception of "steamapps"
Delete all of the files with the exception of the Steam application executable
At the end, the folder should only have the steamapps folder and the Steam executable

Press the WINDOWS key or click on the WINDOWS icon
Write: Windows Security
Click on Windows Securityy
Click on Virus & Threat Protection
In Virus & Threat Protection Settings, click on Manage Settings
Scroll down
In Exclusions, click on Add or Remove Exclusions
Click on Add an exclusion
Select Folder
Choose the Steam folder
Click on Select Folder

Open the Steam folder
Select Steam
Right-click on Steam
Click on Properites
Click on Compatibility
Check the option "Run this program as administrator"
Click on Apply
Click on OK

Open Steam
In the top-left corner of the screen, click on Steam
Click on Settings
Click on Downloads
Scroll down to see more options
In Steam Download Cache, click on Clear Cache

Open Steam
In the top-left corner of the screen, click on Steam
Click on Settings
Click on Storage
Choose the drive in which you have your games installed
Click on the three dots: ...
Click on Repair Library

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