What does the rnathchk.exe file do?
The rnathchk.exe process is also known as RealNetworks ATH Check App and is a part of RealOne Player (Version (32-bit)). This software is produced by RealNetworks (www.realnetworks.com). An obsolete or defective version of rnathchk.exe can cause problems for your computer that can range from slowness to error messages such as these:
- RealNetworks ATH Check App has stopped working. Windows is checking for a solution to the problem... (Windows 10, 8, 7)
- RealNetworks ATH Check App 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)
- rnathchk.exe has encountered a problem and needs to close. (Windows XP)
- Access violation at address FFFFFFFF in module rnathchk.exe. Read of address 00000000.
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What you should know about rnathchk.exe RealNetworks ATH Check App
rnathchk.exe is not a Windows system file and is known to frequently cause computer problems. Rnathchk.exe is found in a subdirectory of "C:\Program Files\Public Documents" - mostly C:\Program Files\Common Files\Real\Update_OB\.
The file size is 57,389 bytes.
The program executes in the background, and can only be terminated using Windows Task Manager. The file was developed by a so-called third party provider - and not by Microsoft.
For this reason, 42% 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 rnathchk.exe. 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 rnathchk?
this file is added to system32 folder in hidden mode.it usually attacks windows 2000.its file can only be viewd using 3rd party softwares such as "start up genie".it opens a large no of ports and establishes connection generally useing smtp protocol.it establishes connection with many websites which u can see usin "netstat -a" command in command prompt........................it is started as an automatic service n can b removed from start up by using "start up genie".so it is not so dangerous once it is removed 4rm start up. u can delete it by usin another os like knoppix or by other os. intelfrenz | |
its RealPlayer, something to do with updates! Shalianahe |
Summary: For this reason, one user has already deleted rnathchk.exe. source: file.net
How to uninstall RealOne Player)

To remove RealNetworks ATH Check App 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 RealOne Player) in the list of available programs.
- Click Uninstall.
How to tell if rnathchk.exe (RealNetworks ATH Check App) 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 RealNetworks ATH Check App. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for RealNetworks ATH Check App 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 rnathchk.exe 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.
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