The F Secure error code 53 is a runtime error. The causes of this error are incompatible programs, bad graphics driver, or virus infections. The troubleshooting steps to resolve the F Secure error 53 are mentioned below on this page.
Launch the Task Manager window by pressing the Ctrl, Alt, and Del keys simultaneously.
All the installed programs will be shown on the screen.
Click the Processes tab, select the program that you suspect to be conflicting with F Secure, and click the End Process button.
Once done, check if the error code 53 has been resolved.
If not, try to find the conflicting program by ending the processes one by one.
After identifying the conflicting programs, uninstall them from your computer.
Uninstalling the conflicting programs
Windows 7 - Click the Start menu, choose the Control Panel option, and click Uninstall a program.
Windows 8 - Select the More Settings option from the Start menu and click the Uninstall a program option.
Windows 10 - Type ‘control panel’ without the single quotes in the Windows search bar. Open the Control Panel window and click the Uninstall a program option.
Search for the conflicting program from the Programs list and click the Uninstall button.