Our Support says:
Getting this error at Windows startup?
There was a problem starting MIO.dll
The specified module could not be found.
A file named MIO.dll has been detected as a threat by many anti-viruses. This might result in the file being removed automatically by your anti-virus.
To stop this file from being loaded at Windows start, remove the autostart entry.
How to remove the Startup entry:
Win XP, VISTA, 7: Press "Windows"-key + "R" to bring up the "Run" dialogue. In "Run" dialogue type "msconfig" and hit Enter Under the tab "Startup", uncheck any boxes relating to these files. Win 8/10 Press CTRL+SHIFT+ESC at the same time to bring up the Task Manager. Under the tab "Start-up", uncheck any boxes relating to these files.
Should you not find any references here to the MIO.dll, try the Microsoft program Sysinternals Autoruns. Available for free at Microsoft technet
More information at support page