How to Fix _is1A.exe Error? Is it safe?

Frustrated by the _is1A.exe error message? Well, you should want to know what this _is1A.exe file is, what causes this error and the most important thing is how to fix this error. In this page, you will find all answers to your questions about this _is1A.exe and the methods to fix it.

Recommended: Fix _is1A.exe Error Automatically

Download Auto Fix Tool

What's _is1A.exe File?

As its file extension denotes, _is1A.exe is a vital EXE file and it's a component of the software InstallShield developed by Windows Software Developer. The latest version of _is1A.exe file is 12.0 and MD5 value is 99646289e008f888de68dde46905006c. This error can be seen on Windows XP, Windows Vista, Windows 7, Windows 8 and Windows 10.

_is1A.exe file information:
File Name:   
   _is1A.exe (Free Scan)
File Description:   
Product Name:   
Product Version:   
   Windows Software Developer
File md5:   
File type:   
   exe file
Security Level(0-5):   
OS Infected:   
   Download _is1A.exe Error Free Scan Tool

Why Do I Receive _is1A.exe Error?

An executable file (also called as EXE) is a file which contains a program capable of being executed or run as a program in the computer. When one double clicks on an EXE file, a built-in routine created by Windows Software Developer will automatically execute codes to run InstallShield on your machine.

The exe file is one of the most useful types of files precisely because it can run programs. However, this also makes it the potentially dangerous. It could be used to deliver malware and other malicious routines. Sometimes, though nothing happens when you double click on an EXE file, some unseen code has been triggered in the background to infect the computer. Therefore, do not double click any EXE whose source is unknown.

Popular _is1A.exe Error Messages

  • _is1A.exe - Entry Point Not Found.
  • _is1A.exe - System Error.
  • _is1A.exe - Application Error.
  • _is1A.exe - Unable to Locate Component.
  • _is1A.exe - Bad Image.
  • _is1A.exe - Runtime Error.

You may receive _is1A.exe error when you run or close InstallShield, start or shut down the computer, or use specific function of InstallShield. The time you encounter the error is very important to troubleshoot the problem.

Causes of _is1A.exe Error

_is1A.exe error can be caused by plenty of reasons. The following are the most common causes of _is1A.exe error.

  • There is a malfunctioning or faulty hardware in your computer.
  • _is1A.exe file is infected with malicious adware, Trojans, spyware and malware.
  • The associated entries of _is1A.exe are corrupted in the registry.
  • _is1A.exe files are deleted by another program by mistake.
  • The software that uses _is1A.exe is not downloaded completely and installed correctly.
  • Another program is in conflict with InstallShield and its shared files.

How to Fix _is1A.exe Error?

Keep in mind, never download EXE files from EXE download websites, because they are not verified by their developers and may contain malicious code which lead to further damage to your computer system. We have listed several solutions to troubleshoot your _is1A.exe problem.

Method 1: Run Disk Cleanup.

Junk files in your hard disk could make InstallShield run slowly and cause _is1A.exe error. Disk Cleanup is another useful utility integrated in Windows to help computer users remove files that are no longer used and free up disk space. Running Disk Cleanup might help you fix _is1A.exe error and improve your computer speed.


a. Press Windows and R keys to bring up Run.


b. In the dialogue box, type cleanmgr and press Enter key.

run disk cleanup

c. Then Disk Cleanup utility will calculate your disk space.

disk cleanup calculating

d. Select the files you want to delete and click OK.

disk cleanup 2

Method 2: Run a virus scan.

Malware infection is one of the most popular cause of various computer problems like _is1A.exe error. Computer malware can make their way into the system, change system settings and corrupt system files. When this happens, InstallShield and Windows becomes more prone to _is1A.exe error and even malfunction.


a. Restart your system into Safe Mode with Networking.

b. Open your antivirus or antispyware program. (You can also use this recommended malware detect tool)

c. Run a full scan for your system.

d. After the scan completes, either quarantine or remove any detected malware.

e. Restart your system.

Method 3: Uninstall and then reinstall InstallShield causing _is1A.exe error.

If _is1A.exe error pops up when you're using InstallShield, then it's worth trying to reinstall InstallShield or the program from Windows Software Developer.


Windows Vista, Windows 7 and Windows 10:

a. Click Start and click Control Panel.

start control panel windows 7

b. Click Uninstall a program.

win7 control panel programs and features

c. Look for InstallShield or the program from Windows Software Developer, right click on it and click Uninstall to uninstall it from your system.

uninstall software

d. After the uninstallation, restart your computer and then reinstall the software with your disc or the installer from the official website.

Windows 8 and 8.1:

a. Hover the cursor to the top right corner of the screen to bring up Charms bar and then click Search.

windows 8 charms bar search

b. Click Settings, type uninstall, and click Uninstall a program in the search results.

uninstall windows8

c. Look for InstallShield or the program from Windows Software Developer, right click on it and click Uninstall to uninstall it from your system.

uninstall software windows8

d. After the uninstallation, restart your computer and then reinstall the software with your disc or the installer from the official website.

Method 4: Reinstall Windows system.

Reinstalling Windows is an easy yet time-consuming way to fix software problems on your computer. It will erase everything on your computer, including your files, programs installed, and computer settings. This should be the last choice to fix your _is1A.exe error, as it will take a lot of time to make things ready again. And this works only when this error is caused by software problem.

Method 5: Repair corrupted Windows registry.

As the most important part of Windows operating system, Windows registry is a place that stores all information and configurations of software and hardware. A problematic registry is one of the most common causes of computer errors like _is1A.exe error. Software installation, uninstallation, malware infection can make changes to the registry. Over time, more and more invalid entries are left and accumulated in the registry and then lead to various errors and problems. The registry needs regular maintenance to keep it tidy and stable. Manual editing the registry is not practical for people with no computer expertise, it's recommended that you use a registry cleaner to do this job.


Note: It requires certain computer knowledge to perform the above solutions. If you're not comfortable with this process, it's recommended that you download and run this automatic error fix utility to fix your PC problems automatically:

Download Auto Fix Tool

Does _is1A.exe error still persist?

Feel free to contact us for more assistance.

Writen by admin

Join the discussion

Your email address will not be published. Required fields are marked *