Hi MelvinHildreth III,
The TextHarvester.dat file that is created is part of the Input Personalization system that adapts the language model and dictionary to a particular user, based on the user's usage. I would not recommend that you delete or disable it for it is a system process and by doing so might compromise your computer's performance. Instead, I suggest that you make your computer secure by installing an antivirus and anti-malware software. For your reference, please click on this link for Consumer antivirus software providers for Windows.
If you have additional questions, please let me know by replying to this thread. This way, I'll get notified and respond back to you as soon as I can.