What is mraid35x?

The genuine mraid35x.sys file is a software component of MegaRAID RAID Controller Driver for Windows Whistler by American Megatrends.
“mraid35x.sys” is a driver file in Windows operating systems, known as the MegaRAID RAID Controller Driver for Windows Whistler 32, which was the code name for Windows XP 32-bit during development. The file was developed by American Megatrends as a part of MegaRAID and operates under 32-bit systems. It resides in the System32 folder. It is part of Windows 2003 Server. Other Windows servers use a different file. As a RAID driver, the file manages devices and file transfers in the RAID structure. American Megatrends, Inc. began in 1985 as a motherboard manufacturer for Dell, which was known as PCs Ltd. during that time. Since then, they have evolved into a worldwide provider of BIOS firmware for many motherboard manufacturers, while also developing software, firmware, controllers, and much more.

MRAID35x stands for MegaRAID 35x

Mraid35x.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 mraid35x.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for mraid35x drivers in need of updating

Mraid35x.sys file information

The process known as MegaRAID RAID Controller Driver for Windows Whistler (version 32) belongs to software MegaRAID Miniport Driver for Windows Whistler (version 32) by American Megatrends (

Description: The original mraid35x.sys is an important part of Windows and rarely causes problems. Mraid35x.sys is located in the C:\Windows\System32\drivers folder. The file size on Windows 10/8/7/XP is 17,280 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. It is a Windows system file. The program has no visible window. The file is a trustworthy file from Microsoft. There is no detailed description of this service. mraid35x.sys appears to be a compressed file. Therefore the technical security rating is 2% dangerous, however you should also read the user reviews.

Recommended: Identify mraid35x.sys related errors

Important: Some malware disguises itself as mraid35x.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the mraid35x.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.


User Comments

Description The device \Device\Scsi\mraid35x did not respond within thr timeout period
If it is corrupt on either a disc or on the harddrive it will not allow you to install windows

Summary: Average user rating of mraid35x.sys: based on 3 votes with 2 user comments. 2 users think mraid35x.sys is essential for Windows or an installed application. One user thinks it's probably harmless. One user is not sure about it.

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Best practices for resolving mraid35x issues

A clean and tidy computer is the key requirement for avoiding problems with mraid35x. 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 mraid35x.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

mraid35x.sys [all]