This page contains some considerations about the installation of DtPad.
Antivirus and Windows 8
Some antivirus, such as Norton, could block DtPad Setup execution since it is not a known program. The same happens trying to install the text editor inside Windows 8 (message shown
As everyone could see on the source code, no dangerous action will be undertake on this process, and administration privileges are required only to allow the copy of DtPad's files inside "Program Files" folder.
At any rate, if you prefer, you can use the archive (available even on CodePlex from 188.8.131.52 version) to use DtPad: in this case you will have to unpack the RAR anywhere you want and start the program clicking on "DtPad.exe" file.