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What does the slserv.exe file do?

The slserv.exe process is also known as User-Level Modem Service and is a part of Modem or, as the case may be, SmartLinkService. This software is produced by Smart Link (www.smlink.com). An obsolete or defective version of slserv.exe can cause problems for your computer that can range from slowness to error messages such as these:

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What you should know about slserv.exe User-Level Modem service

The original slserv.exe file is definitely a Windows system file, but many viruses use the same name in order to remain unnoticed. Slserv.exe is found in the C:\Windows\System32 directory. Frequently occurring are file sizes such as 57,344 bytes (50% of all these files), 45,056 bytes or, as the case may be, 73,796 bytes.
It is the service "SLService".
The file does not supply any version information or other description. The program executes in the background, and can only be terminated using Windows Task Manager. The original file was created by Microsoft. The file itself can therefore be considered trustworthy. For this reason, 25% 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 slserv.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 slserv?

SmartLink’s User-Level Modem Service. This task runs on Windows NT4/2000/XP/2003 system (further information...)
Osiris
It is used as modem software on CLEVO 2200C/2700C
Bart van den Donk
SmartLink’s User-Level Modem Service. This task runs on Windows NT4/2000/XP/2003 system - we are not yet sure as to what it does.
*
It's a smartlink modem service that allows the modem icon to appear in the systray while connected to the internet. It can be disabled, but you lose the ugly icon until service is set back to auto
jiminy
slserv.exe is installed alongside Smartlink communication products and offers additional support to the modem service. It appears to be harmless.
Brent

Summary: 11 users judge slserv.exe to be an essential file that should not be touched. 4 users consider it harmless. However, 2 users consider this to be a suspicious process and would like to get rid of it. For this reason, 5 users have already deleted slserv.exe. source: file.net

How to uninstall Modem or SmartLinkService

To remove User-Level Modem service from your computer, please follow the manual instructions below or use an automatic uninstaller product.

  1. Click the Windows Start Button. You find it in the lower left corner of the taskbar.
  2. Type the word uninstall.
  3. Click Add or remove programs.
  4. Now locate Modem or SmartLinkService in the list of displayed applications.
  5. Click the program, and then click Uninstall.
Remove software in Windows 10
slserv.exe User-Level Modem service fix

How to tell if slserv.exe (User-Level Modem service) 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 User-Level Modem service. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for User-Level Modem service 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 slserv.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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