How to remove an fast error
The free file information forum can help you determine if fast.exe is a virus, trojan, spyware, or adware that you can remove, or a file belonging to a Windows system or an application you can trust.
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Fast.exe file information
The process known as Super Fast User Switcher belongs to software Microsoft Windows Operating System or Outerinfo or Fruity Loops Studio or Powertoys For Windows XP by Microsoft (www.microsoft.com).
Description: The file fast.exe is located in the folder C:\Windows\System32 or sometimes in a subfolder of Windows Temp folder.
Known file sizes on Windows 7/XP are 49,216 bytes (98% of all occurrences), 48,704 bytes or 57,408 bytes. 
Fast.exe is certified by a trustworthy company. It is not a Windows core file. The program has no visible window. The process can be uninstalled in the Control Panel.
Therefore the technical security rating is 26% dangerous, however also read the users reviews.
You can uninstall the program Powertoys For Windows XP or Powertoys For Windows XP/NET, update it, or ask Customer Support for help. Go to www.microsoft.com/windowsxp to update it, go to www.microsoft.com/directory for support, or go to Powertoys For Windows XP or Powertoys For Windows XP/NET in Windows Control Panel (Software or Programs section) to uninstall it.
Recommended: Identify fast.exe related errors
If fast.exe is located in a subfolder of C:\Windows\System32, the security rating is 90% dangerous. The file size is 71,168 bytes. There is no file information. It is located in the Windows folder, but it is not a Windows core file. The program has no visible window. Program uses ports to connect to a LAN or the Internet. The file is not a Windows system file. fast.exe is able to monitor applications.
External information from Paul Collins:
There are different files with the same name:
- "FastUsr" is not required to run at start up. Installs as part of Windows XP PowerToys as an option for very-fast user switching (allowing a keystoke to switch users instead of using the login screen). It is only used for the hot-key switch and yet it hogs 1.5 megs of memory in two separate processes (one run by the user & one by the system). Optional install in PowerToys
- "FastUser" is not required to run at start up. Installs as part of Windows XP PowerToys as an option for very-fast user switching (allowing a keystoke to switch users instead of using the login screen). It is only used for the hot-key switch and yet it hogs 1.5 megs of memory in two separate processes (one run by the user & one by the system). Optional install in PowerToys
Important: Some malware camouflages itself as fast.exe, particularly when located in the c:\windows or c:\windows\system32 folder. Therefore, you should check the fast.exe 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.
Score
User Comments
manpony
Fast scanner
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. Spyware Doctor 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. |
Other processes
hddsvc.exe ntuser.exe bdoesrv.exe fast.exe ltsmmsg.exe ifxtcs.exe hooktitle.dll iwingameshookie.dll downloadmanager.dll oreans.sys fppdis2a.exe [all]
Frits boelema