config.old is also readable using notepad as it is a text based file and as said before is just a backup of your old config.sys. You can read similar files like autoexec.bat etc etc and edit them as well in windoze click start run and type sysedit and the system files like config.sys come up in notepad and can be edited. You could also do them in DOS at the C\> type edit config.sys etc etc
Scandisk - there are several files on a pc with scandisk.*** one being .exe to run the program one of the others is scandisk.log, again this is a text file and can be read with notepad.
