Let's make sure we'll be able to fix the application error, Nagakambing.

CefSharp is a tool that allows you to embed chrome-lite browser functions into something. For example, QuickBooks lets you log into your Intuit account on the internet and not local to the computer system, that is a browser window. Usually, this tool is required in a specific program or device installed on your PC.

Under normal circumstances, this .exe file doesn't cause errors. However, some Trojan horse programs or files may also pretend to be CefSharp BrowserSubprocess and cause problems. Thus, if the file causes a high CPU issue, you can remove the CefSharp.BrowserSubprocess.exe.

The first and simplest way is to end the CefSharp.BrowserSubprocess.exe in the Task Manager. To do so, follow the steps below:
 

1. Right-click the Startup menu and select Task Manager from the context menu.
2. Right-click the CefSharp.BrowserSubprocess.exe from the list of processes and select End Task from the pop-up menu.
3. If the CefSharp.BrowserSubprocess.exe-related process runs in the background, you can disable it. Go to the Startup tab, right-click the CefSharp.BrowserSubprocess.exe from the list of installed programs and select Disabled.
    

The first method can fix the high CPU usage problem temporarily. If you find the CefSharp.BrowserSubprocess.exe file outside the C:\Windows\system32 folder, you'll want to delete it by following the steps below:
 

1. Press the Win + E keys to open the File Explorer, and then find the CefSharp.BrowserSubprocess.exe file.
2. Right-click the file and select Open file location. Then select all the CefSharp.BrowserSubprocess.exe files and click on Delete. Don’t delete the files located in the C:\Windows\system32 folder.

However, if the issue persists, I suggest reaching out to an IT Guy so they'll be to guide you on the best solution for that specific error. Furthermore, you may also experience issues and getting errors related to the company file and install issues, networking errors, etc. . . learn from this article on how you can fix them: Fix Common Problems And Errors With The QuickBooks Desktop Tool Hub.

Reach out to us if you have any questions about CefSharp or if you've got issues when using QuickBooks. We're here to make sure everything is covered.