What is Fastfat?
Fastfat.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 OS, hardware etc.
The free file information forum can help you determine if Fastfat.sys belonging to the Windows system or an application you can trust.
Fastfat.sys file information
Description: The original Fastfat.sys is an important part of Windows and rarely causes problems. Fastfat.sys is located in the folder C:\Windows\System32\drivers.
Known file sizes on Windows 7/XP are 143,360 bytes (78% of all occurrences), 143,744 bytes, 145,152 bytes or 144,768 bytes.
The driver can be started or stopped from Services in the Control Panel or by other programs. The file is a Windows system file. The program is not visible. There is no detailed description of this service. The Fastfat.sys file is a Microsoft signed file. Fastfat.sys seems to be a compressed file. Therefore the technical security rating is 1% dangerous, however also read the users reviews.
Recommended: Identify Fastfat.sys related errors
Important: Some malware disguises itself as Fastfat.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the Fastfat.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.
James Urwiller, Service Manager Computer Warehouse #4 (further information)
Tim, Senior Electrical Engineer
PC Recovery Technician.
Some Nerd (further information)
Security Task Manager shows all running Windows tasks including embedded hidden functions (e.g. keyboard or browser monitoring, autostart entry). A unique security risk rating indicates the likelihood of the process being potential spyware, malware, keylogger or a Trojan.
Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, trojans, keyloggers, malware and tracking threats from your hard disk. Ideal supplement to Security Task Manager.
SpeedUpMyPC scans, cleans, repairs and optimizes your computer.
installiqupdater.exe pvrservice.exe ismini.exe Fastfat.sys drvnddm.sys mmerefresh.exe epmworker.exe asappsrv.dll passthrusvr.exe ycomp5_3_12_0.dll openvpn.exe [all]