What to do when “Failed to lock vertex buffer” appears

There are several ways to get rid of the error, each of which will be effective in one case or another, depending on the provoking factor.

Cleaning and optimization

First of all, eliminating “Failed to lock vertex buffer in CMeshDX8”, you should start deleting unnecessary files from your computer that take up precious space and defragment the disk. This can be done using special software or manually. The procedure is performed as follows:

1. Open Explorer (using the Win + E keys, through the Start menu or launch from the “This PC” shortcut on the desktop).
2. We press RMB on the system disk (usually it is C, but in some cases another letter may be assigned) and select “Properties” from the context menu.
3. In the window that opens, press the “Disk Cleanup” button and wait for the analysis to finish.
4. We tick off all the items in the window that appears, press the “Ok” button and confirm the action.

We repeat the same procedure for other partitions, after which, after returning to the “Properties” of the system disk, go to the “Service” tab and click “Optimize”. In the window that opens, we optimize the disks one by one.

Removing Steam and reinstalling the game

To delete files of the Steam library, perform the following actions:

1. We go to the folder where Steam is located (you can find out the location of the object by clicking on the RMB shortcut – “File location”).
2. Select all the items and folders here, except for the executable file “steam.exe” and the directories “UserData” and “SteamApps” (they should remain), and delete. Also, remove the library shortcut from the desktop. To keep the game and video settings, we also leave the cfg and video.txt configuration files.
3. We launch the executable as administrator (the executable file can also be called simply “Steam” without specifying its extension) by clicking on it with RMB and selecting the appropriate option.
4. We are waiting for Steam to update and download the necessary elements.

We try to restart the game and see if the error has disappeared. If it appears again after deleting the Steam files, you should reinstall the game by completely removing it from the computer in the standard way along with the residual files and downloading it again.

To remove CS: GO, follow these steps:

1. We go to the Control Panel (through the Start menu, a shortcut on the desktop if available, search or using the Run console (Win + R) and the control command) and in the Programs and Features section select the software from the list, press RMB – “Delete”, we confirm the intention.
2. An alternative way to uninstall in Windows 10 is to use the “Settings” tab (Win + I). In the “System” section, open “Applications and Features”, find the required program in the list and remove it.
3. After uninstalling the game, we use third-party tools to get rid of residual files, including entries in the registry, or clean it manually.

Care should be taken when working with the registry, as incorrect actions can lead to undesirable consequences and even to system failure. It is recommended that you make a backup before making changes.

To manually clean the system registry after deletion:

• open the registry editor (using the “Run” console (Win + R) and the “regedit” command);
• to make a copy of the registry, click “File” – “Export” and select the location on the disk where the copy should be exported (to restore the copy, click “File” – “Import”);
• to remove elements related to the program, go to the “Edit” tab and click the “Find …” item (or Ctrl + F);
• enter the exact name of the product in the search field and click “Find Next”;
• the registry window will display CS: GO related files and folders that you can delete.

After cleaning the system from residual software files, delete the Steam files again, and you can install the game.

Windows Disk and Registry Cleanup Tools

Since manual cleaning and working with the registry will take more time and skills, many users resort to using special software that allows them to perform the task in an automatic mode. Examples of products in this category are:

• CCleaner is a simple and convenient optimization tool that allows you to easily clean the system from software garbage and the registry from errors;
• Advanced System Care – a set of utilities that allow you to optimize your computer, getting rid of system junk, malicious software, as well as fix errors in the registry and much more;
• Auslogics Registry Cleaner is an efficient and easy-to-use utility for cleaning the registry from invalid or unused entries;
• Wise Registry Cleaner – the application detects errors in the registry and informs about which changes are safe and which can lead to problems.

DirectX update

The error can be caused by incorrect installation or damage to DirectX (a package of components for solving problems related to programming under Windows). With this set of development tools, games can interact with video and audio devices. You can download the latest version of the package on the Microsoft website, it also usually comes with the game product, but in case of failures and errors, DirectX may require reinstallation. To do this, we perform the following actions:

1. To begin with, we launch the DirectX diagnostic tool, for which we turn to the Run console (Win + R), where we enter the dxdiag.exe command and press Enter.
2. In the window that opens, information about the system and devices is available. On the “System” tab, among other information at the bottom of the list, we find DirectX (for each OS version, the parameters are different, for example, for XP DirectX 9, for “Seven” DirectX 11, and for Windows 8 or 10 – DirectX 12).
3. After that, download the required version of the package to your computer from the official website.
4. Install DirectX, while controlling the installation process, during the installation, uncheck the “Install Bing Bar” item before clicking “Next”, since we do not need optional third-party programs.
5. Reboot and check if the error is gone.

Changing memory allocation

The error often appears due to insufficient RAM for the game to run. To make the 32-bit system allocate more, perform the following actions (the method is suitable for Windows 7):

• open the command line as administrator (for example, using the Run console (Win + R) and the cmd command);
• in the terminal, enter “bcdedit / set IncreaseUserVa 3072” and press Enter;
• close the console and reboot.

Check if the error has disappeared. To return to the previous value, use the “bcdedit / deletevalue IncreaseUserVa” command.

Updating the graphics card driver

Outdated device drivers are a common culprit for crashes, including game crashes. Updating your graphics card driver is simple:

• go to the “Device Manager” (using the “Run” console (Win + R) and the “msc” command, Control Panel or another convenient way);
• in the list of devices we find and open the branch “Video adapters”;
• select your video card, press RMB and “Update drivers”;
• select the automatic driver search option and click “Update configuration”.

Drivers usually come on a disk complete with a video adapter, but if the media is not at hand, you can always find and install the latest software from the official website of the NVidia or AMD developer, specifying the device model when searching for software. After restarting the computer, you can check if the error “ Failed to lock vertex buffer in CMeshDX8″ has disappeared.