Windows users report the “StartUpCheckLibrary.dll file is missing” error, which usually appears due to incomplete installation or corrupt Windows System Files. However, many have also reported this notification popping up when they switch on the computer right after a Windows update. After encountering this issue, and before going into the fixes, see if the issue remains in Safe Mode. Also, keep an eye out for Malwares, and get a check-up as soon as possible.

Why Is StartUpCheckLibrary.dll Error Occurring?

There are several reasons involved for the StartUpCheckLibrary.dll file error. It is possible that the StartUpCheckLibrary.dll file got removed from your system but still has some traces left behind. Moreover, the file got removed due to your system’s security product or installation of the application. Another possible reason could be a corrupted operation of your system.

Fix #1: Remove Traces of StartUpCheckLibrary.dll

As mentioned above, the error notification for StartUpCheckLibrary.dll could appear because the remnants of the file got removed due to an uninstallation or your security product. However, if you use the Microsoft Autoruns utility, you can clear all traces of the file.

You can start by making a System Restore Point. Download Microsoft Autoruns from your web browser. Then, extract the zip file and open the folder which is extracted. After that, right-click on Autoruns and select ‘Run as administrator. Then, search for StartupCheckLibrary in Autoruns search box and delete all entries pointing towards StartUpCheckLibrary.dll where the file is unavailable in the image path column. Once complete with the procedure, reboot your PC and see if the error is fixed.

Need Help Removing StartUpCheckLibrary.dll

Tip: If you’re having trouble with Windows updates, registry errors, drivers, and activation, we recommend using Restoro. This software will scan and fix your problem automatically.

Fix #2: Run An SFC or DISM Scan

A possible reason for the StartUpCheckLibrary.dll file getting crashed could be a corrupt file. Here, the use of an SFC scan comes in handy. By doing so, the system gets scanned and resolved for any present inconsistencies. So, follow the steps below to perform this.

Start by pressing the Win+R keys to launch the Run program, and type in ‘cmd’ in the search box. After that, press Ctrl+Shift+Enter to open the cmd in administrator mode. Then, type in sfc /scannow, press Enter and wait for the scan to complete. Restart your PC and see if the problem is resolved or not.

Fix #3: Remove Specific File From Quarantine

Antivirus programs might point out the problem and mark it as a threat. This means the software will move the file to its quarantine section. In your case, StartUpCheckLibrary.dll will have the same thing. However, recovering the file from Antimalware’s quarantine section will do the trick for you.

Open the windows menu by pressing the Windows button and search for Windows Security in the menu. Then, choose Windows Security from the listed results and go to Threat History once you open Virus and Threat Protection. There, check if the StartUpCheckLibrary.dll file is present or not. If somehow the file is present, restore the StartUpCheckLibrary.dll file and check if the DLL error appears again.

For third-party anti-virus tools, it varies from anti-virus to anti-virus. Locate the quarantine section of the anti-virus and see if StartUpCheckLibrary.dll is quarantined; allow the file, and the error will be fixed.

Since the DLL error (StartUpCheckLibrary.dll is missing) is mainly related to internal file issues, you can easily deal with it. If you are facing errors and issues with other PC games or your PC, then also see our hub for commonly occurring PC errors and their fixes.

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