Tips to open 509 file

Can't open the 509 file? You are not the only one. Thousands of users face similar problems every day. Below you will find tips on how to open 509 files as well as a list of programs that support 509 files.

509 file extension

File Name Internet Security Certificate
File Category Web Files

The 509 file is supported on 1 operating systems. Depending on your operating system, you may need different software to handle the 509 files. Below is a summary of the number of programs that support and open the 509 file on each system platform.

Operating systems
  • 3
  • 0
  • 0
  • 0
  • 0
  • 0

What is 509 file?

The file with the extension 509 is the Web Files file type. Additionally, the Web Files category contains 303 of other files. Internet Security Certificate appears on 1 operating systems as a functional file. These systems consist of Windows, although it may occasionally be found on another system, it will be non-functional. It is recommended to use Opera browser to handle this file. This is a program created by Opera Software ASA. There are also 2 alternative programs to handle the 509 file. The Mozilla Firefox, Microsoft Internet Explorer programs will also handle the file when the Opera browser program does not fulfill its role.

How to open 509 file?

An often recurring problem with Internet Security Certificate is that 509 is not associated with the correct program file. Thus, when you open 509, the program selection wizard or some other program starts. This can be quickly resolved by following the instructions below.

The first thing you should do is just "doubleclick" on the 509 file icon you want to open. If the operating system has an appropriate application to support it and there is also an association between the file and the program, the file should be opened.

Step 1. Install Opera browser

The first step is to check if the computer has the Opera browser program installed. This can be achieved by typing Opera browser into the operating system search engine. If it is not, installation may solve the problem, as most applications create file associations during installation. Later in this article you will find a list of programs that can open 509 files.

Step 2. Create association of Opera browser with 509 files

If the application is or has been freshly installed, but the 509 file still does not use the Opera browser program, it means no association. The association can be created using the drop-down list available by right-clicking on the file and selecting Properties. Information about the file and the program that the file is associated with are available here. Using the "Change" button we can select the desired program. It may happen that in the next window there will be no appropriate program - however, this can be corrected with the "Browse" option where you should manually indicate the program location. However, it is important to check the "Always use the selected program ..." box, this will allow you to permanently associate the 509 file with the Opera browser application.

Step 3. Update Opera browser to the latest version

The fault may also lie with the Opera browser program, it is possible that Internet Security Certificate requires a newer version of the program. This can be done using the application (if it provides such options) or from the Opera Software ASA website and install the latest version.

Step 4. Check for the following problems with the 509 file

The problem may also be with the file itself if the above steps don't work. This could be due to the file itself, the cleanest issues are:

The 509 file may be unusually small compared to the original file. Usually this applies to 509 files downloaded from the Internet in case the download did not finish properly. The file should be downloaded again, making sure that the process has finished correctly.
The most common cause here is computer viruses. Perform a virus scan using available and up-to-date anti-virus software. Some antivirus vendors also provide free online scanners. For the best results, we will scan the entire operating system, not just our 509 file. As a result of the scan, sometimes it is not possible to recover 509 files, which are deleted if there is a backup of this file, then after restoring it, it must also be scanned.
Older version of 509 file may not always be supported by the latest software version. Help should be sought from the software developer, as they usually recommend using free file converters or installing an older version of the program.
There can be many reasons for the failure. Repairing is very dependent on the file type. Sometimes the program itself has options to repair the most popular 509 file corruption. You can restore the file from a backup or use N/A help.
When reading, a message appears that the file was encrypted or corrupted. The encrypted 509 files can be used by the device on which they were encrypted, on any other device it is required to have the appropriate cryptographic key and decrypt the file before its recovery.
Some operating systems do not allow file operations in certain locations, eg in system directories or directly on the system drive. These directories are write-protected to them and it's very hard to fix this problem. It is best to move 509 to a different directory.
This problem usually affects more complex files. In this case, the 509 file is blocked by the first application to open it. Closing other programs should help. Sometimes you have to wait for the session to the file 509 to close. However, some background programs may block the 509 file while scanning. If the problem persists, restart the machine.