Error 0X800F080C is tied to corrupted system files and .NET framework issues. In this article, we will focus on how to fix it starting first with .NET fixes and then moving to system-related ones. Follow the guide step by step so you can fix this error fast and easily.
As previously stated 0X800F080C error can occur due to issues with .NET framework, 3.5 framework to be more precise and there are two ways we can fix this error. Follow the guide below as presented:
First thing is to try and install the framework from Window features itself. Sometimes installation and activation of .NET 3.5 in other ways can result in this error. To install it do the following:
Press ⊞ WINDOWS + R to open the run dialog
Inside run type in appwiz.cpl and press ENTER to open up the Programs and Features menu
Inside the Programs and Features menu click on Turn Windows features on or off.
Check the box associated with .NET Framework 3.5 (this package includes .NET 2.0 and 3.0)
Press OK
Click on YES and wait for the package to be installed then reboot your PC
If the previous step was not successful or you already had .NET 3.5 installed then run the troubleshooter in order to fix issues.
Go to the official Microsoft .NET framework repair tool website here and download it.
Once downloaded install the tool and follow onscreen instructions.
If the previous solution has not provided you with results then you have system file corruption that needs to be fixed. Move from one solution to another as presented below:
SFC scan is a built-in Windows tool for solving corrupted system files issues, it is fully automated and does not require from the user any kind of knowledge or information. To run it and scan the system do the following:
Press ⊞ WINDOWS + X to open the secret menu
Left-click on the command prompt (admin)
In command prompt type SFC /SCANNOW and press ENTER
Wait for the process to finish, do not interrupt it and once it is done, restart your computer
DISM scan is similar to SFC scan but it tackles different types of system file corruption and it is recommended to run it also after SFC has been completed. Please note that for DISM scan to be successful you will need a stable internet connection since DISM will replace corrupted files with new ones downloaded from Microsoft. To run it do the following:
Press ⊞ WINDOWS + X to open the secret menu
Left-click on the command prompt (admin)
inside command prompt type: exe /online /cleanup-image /scanhealth followed by ENTER, then type: Dism.exe /online /cleanup-image /restorehealth also followed with ENTER.
Leave scan to finish and reboot your PC

DISM.exe /Online /Cleanup-image /Scanhealth DISM.exe /Online /Cleanup-image /Restorehealth
bcdedit /set recoveryenabled NO
chkdsk /r /f
Microsoft is once again advising its customers to disable Windows print spooler after a new vulnerability that allows hackers to execute malicious code on machines has emerged. While a patch fixing the flaw will be released in due course, the most effective workaround currently on the table is to stop and disable the print spooler service entirely.
"An elevation of privilege vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights."
The greatest lag and server crashes are pinpointed to game-creating events. When a player creates a new online game, the server needs to pull a lot of details from the database and make a game, due to some legacy code present this process takes some time and it is demanding a bit on the server-side, and although code was optimized to cater to more modern approach some legacy code still remains.
Another thing that was spotted to affect performance itself is player behavior, to be more specific, modern gamer behavior. Where players find good builds and runs on the internet and then go to farm-specific areas or bosses for loot or experience points, which in return boils down to making plenty and short runs that are made by creating games and after run eliminating them. Now pair that with the previous statement about legacy server and database code and you can add 1 and 1 and see how this might be an issue.
A lot of short games over legacy code are placing games in a state it was not designed for back in 2001 and therefore we have issues. Sadly solutions without completely rewriting the whole code are not very promising and they include rate limiting, which will prevent players to create many games in succession in a short period of time and maybe even login queues to drop a load on servers.
Blizzard reached to people in the whole company, even old diablo 2 developers to ask for advice and they say that they are working on solutions so they could lift limitations and have everything running fine. Program here refers to the name of a program that caused the User32.dll error message.“This application has failed to start because USER32.dll was not found. Reinstalling the application may fix this problem.”
Or“[Program] illegal system DLL relocation”
Error Causes