What is issch.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the issch.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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Issch.exe file information

Windows Task Manager with issch
Issch.exe process in Windows Task Manager

The process known as InstallShield Update Service Scheduler or Macrovision FLEXnet Connect Scheduler or Macrovision Software Manager Scheduler or Macrovision Update Service Scheduler

belongs to software InstallShield Update Service or Macrovision FLEXnet Connect or Software Manager or Jasc Paint Shop Photo Album (version 5) or Macrovision Update Service or Roxio Easy VHS to DVD or Roxio Creator (version LE 10) or Sonic Update Manager

by InstallShield Software ( or Macrovision ( or Sonic Solutions (

Description: Issch.exe is not essential for the Windows OS and causes relatively few problems. Issch.exe is located in a subfolder of "C:\Program Files\Common Files" or sometimes in a subfolder of the user's profile folder (mostly C:\Program Files\Common Files\InstallShield\UpdateService\). Known file sizes on Windows 10/8/7/XP are 81,920 bytes (82% of all occurrences), 69,632 bytes and 7 more variants. 
Issch.exe is not a Windows system file. The program is loaded during the Windows boot process (see Registry key: MACHINE\Run, Run). The program is not visible. Therefore the technical security rating is 42% dangerous; however you should also read the user reviews.

Uninstalling this variant: You can uninstall InstallShield Update Service Scheduler, update it, or get help from the software vendor. Click on to update it, click on for support, or click on InstallShield Update Service Scheduler in Windows Control Panel (Software or Programs category) to uninstall it.

Recommended: Identify issch.exe related errors

External information from Paul Collins:

Important: Some malware camouflages itself as issch.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example Mal/Generic-L (detected by Sophos), and Trojan Horse (detected by Symantec). Therefore, you should check the issch.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

It is not needed. Programs should be updated manually, not automatically, so the user may know what changed when a problem does occur. It is deceptive, as it is unclear which program installs the Install Shield Updater, and there is no record of the Install Shield Updater in add and remove programs.
  Rob McCrea  
Install Shield Update Service Scheduler
  Joshua Haglund   (further information)
installshield piece of shit
Installed with Dragon Naturally Speaking. Harmless
It's good, runs in the background, and installs updates.
Configurable through the "Program Updates" icon in Control Panel. But even if you tell it not to update any program automatically, this process continues to run, even after reboot. Those who say it is safe likely work for (or are affiliated with) Macrovision. It's more of a nuisance than anything else. Personally, I disabled it by removing it from the registry. You can also use MSCONFIG... under the startup tab, unselect ISUSPM and issch.
Update Manager -- May install or re-configure ANYTHING
unnötig, verbraucht nur ressourcen
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of issch.exe: based on 60 votes with 9 reviews. 32 users think issch.exe is essential for Windows or an installed application. 4 users think it's probably harmless. 16 users think it's neither essential nor dangerous. 4 users suspect danger. 4 users think issch.exe is dangerous and recommend removing it. 4 users don't grade issch.exe ("not sure about it").

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Best practices for resolving issch issues

A clean and tidy computer is the key requirement for avoiding problems with issch. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the issch.exe process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

issch.exe [all]