Hi there
Another option is to open win.ini and ensure that the programs you refer to are not listed on the Run or Load lines - simply delete the file reference. Similarly, if you have autoexec.bat and config.sys active, make sure there is not a reference to the programs in them. You can edit these files using notepad - either delete the line that refers to the programs you want to disable, or type REM followed by a space at the start of the relevant lines.
Before you make any changes, save the files with a new name or extension so that if anything goes wrong you can replace the edited files with the unedited originals
Hope this helps....