The error would not happen until AutoCAD tried to load the offending lisp. Rather than deleting any lisp stop it from being loaded.
1. Make sure you use an ASCII editor like Vlide or notepad, not Word or Wordpad.
2. Comment out portions of acad.lsp and acaddoc.lsp that load code. Use a semicolin (;) at the start of each line or to comment a number of lines start with a semicolin followed by the pipe symbol (;|) and end with the same reversed (|;) as in the example:
Code:
;|(if (/= (getvar "wscurrent") "My Workspace")
(progn
(command "wscurrent" "My Workspace")
(princ "\n\"My Workspace\" set as the current Workspace. ")
)
)|;
3. Add lines of code like (princ "\n\"Acaddoc.lsp\" loading.") and (princ "\n\"Acaddoc.lsp\" loaded.") at the start and end so you can see when the files start to load and if they finish.
4. Once you find the code that's causing the problem fix it or post it here if you still need help.