Hi, there are a couple of components for the application you are describing. My Dell and PC Checkup. Which one are you running? I have included a direct link to the file below in case you were looking to remove the current file and re-install.
I dl'd and ran the file from the location above on a Windows 8.1 (update 1) system and it seems to be performing normally.
Out of curiosity, did you try running it in compatibility mode?