What is acstart16.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 acstart16.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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Acstart16.exe file information

Windows Task Manager with acstart16
Acstart16.exe process in Windows Task Manager

The process known as AutoCAD Startup Accelerator belongs to software AutoCAD (version 2006 - Italiano, 2006 - Deutsch, LT 2005 - English) or AutoCAD Mechanical (version 2006) by Autodesk (

Description: Acstart16.exe is not essential for Windows and will often cause problems. Acstart16.exe is located in a subfolder of "C:\Program Files\Common Files". The file size on Windows 10/8/7/XP is 10,872 bytes. 
The program has a visible window. It is a Verisign signed file. The file is digitally signed. The process starts upon Windows startup (see Registry key: MACHINE\User Shell Folders). The file is not a Windows core file. The software can be removed using the Control Panel's Add\Remove programs applet. acstart16.exe appears to be a compressed file. Therefore the technical security rating is 0% dangerous, however you should also read the user reviews.

Uninstalling this variant: It is possible to uninstall the program using the Control Panel ⇒ Uninstall a ProgramAutoCAD Mechanical 2006 or AutoCAD LT 2005 - English.

Recommended: Identify acstart16.exe related errors

Important: Some malware camouflages itself as acstart16.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the acstart16.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

Enables AutoCAD to start up faster
  Craig Sweeney   (further information)
this process will disable the unregistered AutoCAD in your PC.
virus trojen

Rating chart

Summary: Average user rating of acstart16.exe: based on 8 votes with 3 user comments. 5 users think acstart16.exe is essential for Windows or an installed application. One user thinks it's neither essential nor dangerous. 2 users think acstart16.exe is dangerous and recommend removing it.

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Best practices for resolving acstart16 issues

A clean and tidy computer is the key requirement for avoiding problems with acstart16. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic 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 6resmon 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 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the acstart16.exe process on your computer, the following programs have proven to be helpful: ASecurity 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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

acstart16.exe [all]