I don't know your PSPad version. Reboot is necessary, if you reinstall PSPadShell.dll coz this library is registered and in some cases is locked by Explorer or file manager. You doesn¨t need reboot after PSPad installation, you can use it directly after installation.
-- <http://forum.pspad.com/read.php?2,53495,53499> PSPad freeware editor http://www.pspad.com
