Appinit_dll.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. The following information can help you determine if appinit_dll.dll is a Windows system file or if it belongs to an application that you can trust.
Description: Appinit_dll.dll is not essential for the Windows OS and causes relatively few problems. The file appinit_dll.dll is located in a subfolder of C:\Windows.
Known file sizes on Windows 10/8/7/XP are 461,032 bytes (75% of all occurrences) or 148,256 bytes.
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior. The appinit_dll.dll file is a Verisign signed file. The file has a digital signature. The program starts upon Windows startup (see Registry key: AppInit_DLLs). The appinit_dll.dll file is not a Windows system file. It can change the behavior of other programs or manipulate other programs. The program has no visible window. There is no detailed description of this service. Therefore the technical security rating is 47% dangerous.
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If appinit_dll.dll is located in the C:\Windows\System32 folder, the security rating is 48% dangerous. The file size is 482,536 bytes (50% of all occurrences) or 512,232 bytes. It can change the behavior of other programs or manipulate other programs. The program has no visible window. Appinit_dll.dll is a Verisign signed file. The file is certified by a trustworthy company. There is no detailed description of this service. The appinit_dll.dll file is not a Windows core file.
If appinit_dll.dll is located in a subfolder of "C:\Program Files", the security rating is 8% dangerous. The file size is 157,792 bytes. The program has a visible window. Appinit_dll.dll is a Verisign signed file. The appinit_dll.dll file is digitally signed. The application starts upon Windows startup (see Registry key: AppInit_DLLs). It is not a Windows core file.
Important: Some malware camouflages itself as appinit_dll.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the appinit_dll.dll 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.
A clean and tidy computer is the key requirement for avoiding problems with appinit_dll. 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 appinit_dll.dll 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.