Let try to run a system scan with Speed Up My PC to see any error, then you can do some other troubleshooting steps. What can you do to fix Service tool v3400.exe ? If you encounter difficulties with Service tool v3400.exe, you can uninstall the associated program (Start > Control Panel > Add/Remove programs Let try the program named DriverIdentifier to see if it helps. Is Service tool v3400.exe using too much CPU or memory ? It's probably your file has been infected with a virus. Something wrong with Service tool v3400.exe ?
