How to fix fatal error WTV270 in GTA IV?
The “Fatal Error WTV270” error in GTA IV occurs for completely different reasons: from an outdated software version to a broken motherboard. We will not go through them all, but we will list the solutions that, according to user reviews, work most often.
Downgrading the game
We have seen a number of mentions that the WTV270 bug was appearing in a specific version of the game. For example, in 126.96.36.199, which often does not work correctly. If you rollback to a previous version, everything should work fine. You can also try to immediately upgrade to 188.8.131.52, this time it might work. To do this, just delete the current game and download version 184.108.40.206 from any site.
wllogin_64 and wllogin-32 is part of the Windows Live service, which is essential for the Windows Live service to work. Running those files as well as restoring the service might work. The easiest way to fix this problem is to install the Windows Live Assistant utility, but you can also simply download the specified files in the game folder.
Check for xlive.dll file
Incorrect work of xlive.dll is often pointed out as the main culprit of the problem with the WTV270 error. You can simply reinstall the specified library, but there is another option – to replace the file with XLiveLess.DLL. This is a modified version of the library, which was created specifically to fix a fatal error. All you need to do is download the archive and extract the xlive.dll file from there, and then paste it with a replacement into the GTA IV directory. The default location is C:/Steam/SteamApps/common/Grand Theft Auto IV/GTAIV.
The outdated version of Games for Windows Live will also not allow you to play GTA IV, the service needs to be updated. If you have Windows 10 installed, you should use Xbox Live, which is the modern replacement for GFWL. However, such an old game does not support Xbox Live, you will need a patch that will implement support. Installation is carried out using the installation wizard, so you will not get confused. After installation is complete, restart the operating system.
We hope that the fatal error in GTA IV with the code WTV270 will no longer appear. Although you can additionally try running the game in compatibility mode as well as in windowed mode.