Fsmainui.exe -

Are you seeing a (like 0xc0000135) or a crash report when trying to open the program?

: It acts as the primary "host" for the graphical user interface (GUI) of the F-Secure suite. Common Locations : You will typically find it in subfolders of C:\Program Files (x86)\F-Secure\ or, if provided by an ISP, under titles like C:\Program Files (x86)\Charter Security Suite\ui\ Resource Usage fsmainui.exe

This file appears in the following F-Secure / WithSecure products: Are you seeing a (like 0xc0000135) or a

Stuck background scan, database corruption, or conflict with real-time protection of another antivirus (never run two active antivirus suites). if provided by an ISP

If you are experiencing lag or crashes related to this process, try these steps in order: