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What is msahci?

The genuine msahci.sys file is a software component of Microsoft Windows by Microsoft.
Microsoft Windows is an operating system; a piece of software that acts as a bridge between the hardware and software counterparts of a computer. Msahci.sys is a driver designed to faciliate the Serial Advanced Technology Attachment (SATA) mode of a disk device. This is a critical Windows component and should not be disabled or removed.

The Microsoft Windows operating system exhibits a graphical user interface and made its first appearance in November, 1985. It was developed using a GUI system shell for MS-DOS to target the growing market for graphical user interfaces. Microsoft Windows eventually took over the market with a 90% share, taking over large competitors such as Apple. It is currently available in over 137 languages.

Microsoft, founded by Bill Gates and Paul Allen in 1975, is the world's largest software maker with respect to revenue. Microsoft is best known for the Windows operating system. The company quickly rose to fame and fortune following the success of its 1986 public share offering turning three people into billionaires and an estimated 12,000 Microsoft employees into millionaires. Microsoft is headquartered in Redmond, Washington, USA.

MsAHCI stands for Microsoft Advanced Host Controller Interface

Msahci.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if msahci.sys is a Windows system file or if it belongs to an application that you can trust.

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

Msahci.sys file information

The process known as MS AHCI (version 1.0 Standard Driver) belongs to software Microsoft Windows Operating System by Microsoft (www.microsoft.com).

Description: Msahci.sys is not essential for the Windows OS and causes relatively few problems. The msahci.sys file is located in the C:\Windows\System32\drivers folder. The file size on Windows 10/8/7/XP is 28,032 bytes. https://www.file.net/process/msahci.sys.html 
The driver can be started or stopped from Services in the Control Panel or by other programs. It is a Microsoft signed file. The program is not visible. The file has a digital signature. The service has no detailed description. Msahci.sys is not a Windows system file. msahci.sys appears to be a compressed file. Therefore the technical security rating is 10% dangerous.

Uninstalling this variant: You have the option to do the following:
  • visit the www.microsoft.com website
  • uninstall the software Microsoft Windows using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program)

Recommended: Identify msahci.sys related errors

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

A clean and tidy computer is the key requirement for avoiding problems with msahci. 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 msahci.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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.



Other processes

msahci.sys [all]