Tim,
Thank you for your quick response. I deleted the ArcPad.apx from the MyArcPad folder in the location you provided but continue to encounter the same error. My account is located in the default location: C:\Users\<user>. ArcPad is installed in the following location: C:\Program Files (x86)\ArcGIS\ArcPad10.0. The main ArcPad.apx file is located in the systems folder of the aforementioned location, C:\Program Files (x86)\ArcGIS\ArcPad10.0\System. I did not install ArcPad on my machine because I do not have admin rights to do so. Timothy McElligott is my direct supervisor while our IT department handles installs. I have not moved/deleted any files since I started using ArcPad a couple months ago, so this error suddenly appearing has been very confusing.
Thank you,
Chris Bowering
Public Works Planning Aide
Ontario County DPW