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What is FirewallAPI.dll & How to Fix its Errors
Using a DLL fixer tool is very effective in this situation
4 min. read
Updated onApril 2, 2024
updated onApril 2, 2024
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Key notes
FirewallAPI.dll is a DLL made by Microsoft and it’s known as the Windows Defender Firewall API file. It is mostly used byMicrosoft Office Access 2010but many of our readers complained about the multiple errors caused by FirewallAPI.dll. Here, you will find out all about this DLL file and how to fix its errors.
What is FirewallAPI.dll and what errors is it causing?
As we mentioned above, FirewallAPI.dll is a DLL file that stores information and instructions for executable (EXE) files. It was created so that multiple apps have the right memory allocation and make your PC more efficient when running them.
However,FirewallAPI.dll is missing, gets corrupted, and produces errors such as the ones listed below:
All of these errors are caused by missing or corrupt FirewallAPI.dll. The causes for this problem range from accidental deletion, virus, or malware infection tocorrupt system filesand apps that are using the file.
How do I fix FirewallAPI.dll errors?
Before going to more complicated solutions, perform the following prerequisite methods:
If these workarounds were not efficient, start performing the solutions below.
1. Use a DLL fixer
Manually reinstalling the FirewallAPI.dll is a risky endeavor so, in this case, we strongly recommend using aDLL fixer.
2. Run an SFC scan
System File Checker is an effective Windows tool that detects and repairs the corrupt system file so it can be very efficient for fixing the FirewallAPI.dll error.
3. Perform a full virus scan
If your PC is infected with a virus or malware, they could mess with the system files and FirewallAPI.dll.
Scanning your PC using Windows Defender might be effective, but we recommend scanning your system with amore powerful third-party antivirus.
4. Perform System Restore
System Restore is like a time capsule for your PC and will turn back your system to a previous point in time before the FirewallAPI.dll error ever happened so it will fix the problem.
These are the most effective solutions to fix FirewallAPI.dll errors and we hope that your PC and apps are functioning correctly now.
However, if the situation is more serious, you will need toreset your Windows 11 to factory settings.
For any questions or other viable solutions, let us know about them in the comments section below.
More about the topics:DLL errors,DLL issues
Claudiu Andone
Windows Toubleshooting Expert
Oldtimer in the tech and science press, Claudiu is focused on whatever comes new from Microsoft.
His abrupt interest in computers started when he saw the first Home Computer as a kid. However, his passion for Windows and everything related became obvious when he became a sys admin in a computer science high school.
With 14 years of experience in writing about everything there is to know about science and technology, Claudiu also likes rock music, chilling in the garden, and Star Wars. May the force be with you, always!
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Claudiu Andone
Windows Toubleshooting Expert
Oldtimer in the tech and science press, with 14 years of experience in writing on everything there is to know about science, technology, and Microsoft
