What is ahcache?

ahcache.sys is a system file associated with the Windows operating system, developed by Microsoft. It is also known as the Application Compatibility Cache.

The ahcache.sys file plays a crucial role in the smooth functioning of the Windows operating system. It is responsible for storing the 'Application Compatibility Cache' which helps in improving the performance of the system. This cache contains information about the compatibility of various applications with the Windows operating system. By storing this information, Windows can quickly determine whether a specific application is compatible with the current version of the operating system, thereby enhancing the system's performance and efficiency.

As a system file, ahcache.sys is essential for the proper functioning of the Windows operating system. Without it, the system may experience errors or may not function correctly. It is not recommended to manually delete or alter this file as it could lead to system instability or crashes.

Under normal circumstances, there is no need to remove or disable ahcache.sys. In some cases, this file may be corrupted or infected by malware, which can cause system errors or security issues. If you suspect that the ahcache.sys file is causing problems, it is recommended to use a trusted antivirus software to scan and repair the file. In extreme cases, you may need to reinstall the Windows operating system to replace the corrupted file with a clean version.

Always ensure to back up your data before making any significant changes to your system files.

Run a free scan to check for ahcache drivers in need of updating

Ahcache.sys file information

The process known as Application Compatibility Cache belongs to software Microsoft Windows Operating System by Microsoft (www.microsoft.com).

Description: The original ahcache.sys is an important part of Windows and rarely causes problems. The ahcache.sys file is located in the C:\Windows\System32\drivers folder. The file size on Windows 10/11/7 is 210,432 bytes.
The driver can be started or stopped from Services in the Control Panel or by other programs. The file is a Windows core system file. The program has no visible window. The ahcache.sys file is a Microsoft signed file. ahcache.sys appears to be a compressed file. Therefore the technical security rating is 0% dangerous.

Recommended: Identify ahcache.sys related errors

Important: Some malware disguises itself as ahcache.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the ahcache.sys 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.

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Best practices for resolving ahcache issues

A clean and tidy computer is the key requirement for avoiding problems with ahcache. 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 executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To get your computer running as fast as it did on day one, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.

To help you analyze the ahcache.sys 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. A good Bantivirus software detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

updateadmin.exe asrsp.exe ltsvcmon.exe ahcache.sys dbagent.exe mmtask.exe kernel.exe cpmonitor.exe pchelpsoftdriverupdater.exe vtusr.exe showdesktop.scf [all]

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