What is fastuserswitchingcompatibilityex.dll file ?

Most antivirus programs identify FastUserSwitchingCompatibilityex.dll as malware—e.g. BitDefender identifies it as Gen: [email protected], and Kaspersky identifies it as Trojan-Spy.Win32.Agent.bpuq or Trojan-Spy.Win32.Agent.bqcp.

Follow steps bellow to try fix the problem with fastuserswitchingcompatibilityex.dll

1. Use cleanmgr

To run the command cleanmgr :
Press Windows key + Q.
Enter cmd in search box , followed by the combination Ctrl + Shift + Enter to run it as Administrator.
Enter the command cleanmgr and press Enter.

2. Use sfc /scannow

To run the command sfc /scannow :
Press Windows key + Q.
Enter cmd in search box, followed by the combination Ctrl + Shift + Enter to run it as Administrator.
Enter the command sfc /scannow and press Enter.

3. uninstalling programs :

To uninstall unnecessary programs :
Open the Start menu (Press Windows key + X) .
Click the first menu item Programs and Features.
Search unnecessary programs in the list of installed programs, .
Click the software you want to uninstall.

4. using msconfig

To run the command msconfig :
Press Windows key + Q.
Enter cmd in search box, followed by the combination Ctrl + Shift + Enter to run it as Administrator.
Enter the command msconfig and press Enter.

5. Automatic Update

To run the command wuauclt /ShowWindowsUpdate:
Press Windows key + Q.
Enter cmd in search box, followed by the combination Ctrl + Shift + Enter to run it as Administrator.
Enter the command wuauclt /ShowWindowsUpdate and press Enter.

6. Use resmon command

To run the command resmon :
Press Windows key + Q.
Enter cmd in search box, followed by the combination Ctrl + Shift + Enter to run it as Administrator.
Enter the command resmon and press Enter.

7. use DISM.exe

To run the command DISM.exe /Online /Cleanup-image /Restorehealth :
Press Windows key + Q.
Enter cmd in search box, followed by the combination Ctrl + Shift + Enter to run it as Administrator.
Enter the command DISM.exe /Online /Cleanup-image /Restorehealth and press Enter.

fastuserswitchingcompatibilityex.dll descriptions

FastUserSwitchingCompatibilityex.dll is not essential for Windows and will often cause problems. FastUserSwitchingCompatibilityex.dll is located in the C:WindowsSystem32 folder.;Known file sizes on Windows 10/8/7/XP are 73,748 bytes (60% of all occurrences) or 73,728 bytes.;The service can be started or stopped from Services in the Control Panel or by other programs.;There is no file information. The program is not visible. The FastUserSwitchingCompatibilityex.dll file is not a Windows system file.;FastUserSwitchingCompatibilityex.dll is able to monitor applications and manipulate other programs.;FastUserSwitchingCompatibilityex.dll appears to be a compressed file.;Therefore the technical security rating is 44% dangerous.