When I plug my 18.0.1 'Win To USB' external hard drive into my 64-bit HP Windows 10 computer I get the following message: "There's a problem with this drive. Please scan this drive now to fix it." If I scan the drive, the 'Win to USB' program no longer functions and must be reloaded onto the external hard drive. I assume the problem is with the 'Win To USB' program (rather than a specific program from Portable Apps.com), and it occurs with or without an installed third party antivirus program. Can anyone comment on a similar problem and solution?