Av5flt.sys is filename of the process running on Microsoft Windows operating system. This process belongs in most cases to product Dynamic Link Library and is developed by Microsoft Corporation company. File version information describes this process as 188.8.131.52. This process is located in directories C:\Windows\system32\ .
In the operating system there can be many libraries and shared libraries opened for one process or application. Each shared library has a special extension, the most common are .DLL (dynamic linking library), .OCX (ActiveX), .SYS (system file or driver), .BPL (Borland package library), .DRV (general hardware driver). Shared libraries can carry application resources (bitmaps, icons, stored external application's data - in case of games e.g. pictures or maps etc.) or also executable codes - functions and methods, which can be called out of the library, executed in the memory of the operating system and they return only results back to the calling application or process.
about distributed Av5flt.sys binaries
Dynamic Link Library
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Step 1: Copy the "Av5flt.sys" file you extracted and paste it into the "C:\Windows\System32" folder.
If you are using a 64 Bit operating system, copy the "Av5flt.sys" file and paste it into the "C:\Windows\sysWOW64" as well.
NOTE! On Windows operating systems with 64 Bit architecture, the dll file must be in both the "sysWOW64" folder as well as the "System32" folder. In other words, you must copy the "Av5flt.sys" file into both folders.
In order to complete this step, you must run the Command Prompt as administrator. In order to do this, all you have to do is follow the steps below.
NOTE! We ran the Command Prompt using Windows 10. If you are using Windows 8.1, Windows 8, Windows 7, Windows Vista or Windows XP, you can use the same method to run the Command Prompt as administrator.
Open the Start Menu and before clicking anywhere, type "cmd" on your keyboard. This process will enable you to run a search through the Start Menu. We also typed in "cmd" to bring up the Command Prompt.
Right-click the "Command Prompt" search result that comes up and click the Run as administrator" option.
Paste the command below into the Command Line that will open up and hit Enter. This command will delete the damaged registry of the Av5flt.sys file (It will not delete the file we pasted into the System32 folder; it will delete the registry in Regedit. The file we pasted into the System32 folder will not be damaged).
%windir%\System32\regsvr32.exe /u Av5flt.sys
If you have a 64 Bit operating system, after running the command above, you must run the command below. This command will clean the Av5flt.sys file's damaged registry in 64 Bit as well (The cleaning process will be in the registries in the Registry Editor< only. In other words, the dll file you paste into the SysWoW64 folder will stay as it).
%windir%\SysWoW64\regsvr32.exe /u Av5flt.sys
We need to make a new registry for the dll file in place of the one we deleted from the Windows Registry Editor. In order to do this process, copy the command below and after pasting it in the Command Line, press Enter.
%windir%\System32\regsvr32.exe /i Av5flt.sys
Windows 64 Bit users must run the command below after running the previous command. With this command, we will create a clean and good registry for the Av5flt.sys file we deleted.
%windir%\SysWoW64\regsvr32.exe /i Av5flt.sys
You may see certain error messages when running the commands from the command line. These errors will not prevent the installation of the Av5flt.sys file. In other words, the installation will finish, but it may give some errors because of certain incompatibilities. After restarting your computer, to see if the installation was successful or not, try running the software that was giving the dll error again. If you continue to get the errors when running the software after the installation, you can try the 2nd Method as an alternative.
Method 2: Copying the Av5flt.sys File to the Software File Folder
In order to install the dll file, you need to find the file folder for the software that was giving you errors such as "Av5flt.sys is missing", "Av5flt.sys not found" or similar error messages. In order to do that, Right-click the software's shortcut and click the Properties item in the right-click menu that appears.
Click on the Open File Location button that is found in the Properties window that opens up and choose the folder where the application is installed.
Copy the Av5flt.sys file into this folder that opens.
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