How to eliminate symdns driver problemsThe symdns.sys (DNS Filter driver) file is a Windows driver. Generally, drivers are used by Windows to enable internal components like graphic cards and drives, or external devices, such as printers, backup media or input devices.
Click here to check if you need to update your symdns driver.
The symdns.sys process is also known as DNS Filter Driver and is a part of Symantec Security Drivers. This software is produced by Symantec (www.symantec.com). An obsolete or defective version of symdns.sys can cause problems for your computer that can range from slowness to error messages such as these:
- DNS Filter driver has stopped working. Windows is checking for a solution to the problem... (Windows 10, 8, 7)
- DNS Filter driver has stopped working. A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available. (Windows 10, 8, 7)
- symdns.sys has encountered a problem and needs to close. (Windows XP)
- Access violation at address FFFFFFFF in module symdns.sys. Read of address 00000000.
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What you should know about symdns.sys DNS Filter driver
symdns.sys is not part of Windows, but it is important nonetheless. Symdns.sys is found in the C:\Windows\System32\drivers directory.
Frequently occurring are file sizes such as 12,984 bytes (36% of all these files), 13,616 bytes as well as 4 other variants.
If necessary, you can manually stop or start this driver in the Device Manager. The Device Manager can be found in Windows Control Panel under Hardware and Sound/Devices and Printers/Device Manager. The driver facilitates access to your computer's hardware and accessories. The application does not have a visible window, and does not appear on the taskbar. The original file is digitally signed. Check your file. The original file has been signed by a trusted signature authority. This lets you check your copy to see if it is a counterfeit. It is unusual for the service not to provide any indication of how and why it is required. This file was developed by a so-called third party provider - and not by Microsoft. You may uninstall the related program using Windows Control Panel. symdns.sys appears to be a file that was compressed by an EXE-Packer. This technique is often used by trojans to keep the file size small and also hamper debugging efforts. However, this in itself is not sufficient reason to presume malicious intent, since even well-intentioned, professional software producers take advantage of compressed files. For this reason, 8% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.
If you see this file on your hard drive or in Windows Task Manager, please make sure that it is not a malicious variant. It's a fact that many trojans try to cloak their true identity by calling themselves symdns.sys. With the above information or by using tools like Security Task Manager you can determine if, in your case, the file is an undesirable variant.
What do other computer users say about symdns?
|Part of Symantec Norton Internet Security suite |
Summary: One user judges symdns.sys to be an essential file that should not be touched. source: file.net
How to uninstall Symantec Security Drivers
To remove DNS Filter driver from your computer, please follow the manual instructions below or use an automatic uninstaller product.
- Click the Windows Start Button. In Windows 8, look for Control Panel.
- Click Control Panel.
- Click Uninstall a program.
- Look for Symantec Security Drivers in the list of available programs.
- Click Uninstall.
How to tell if symdns.sys (DNS Filter driver) was uninstalled cleanly
After uninstalling, restart your computer. Then start Windows Explorer and see if there is still a folder with the name of the software under C:\Program Files. Be sure to check the Registry as well for remnants of DNS Filter driver. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for DNS Filter driver or the name of the producer. Always keep in mind that only a computer professional should ever directly delete entries in the Windows Registry.
What to do if a program does not uninstall
The easiest way to remove any kind of software cleanly and accurately is to use an uninstaller tool. Because the uninstaller automatically creates a backup, there is no risk of anything going wrong.
Last but not least
If Windows not working quite right for you, or if startup is taking a long time, or symdns.sys is causing problems for you, a good Windows diagnostic tool may very well help. This is especially effective when it comes to older computers that have accumulated vast quantities of "garbage data" as the result of many software installs and uninstalls.