The acaddoc.lsp virus modified *.lsp and *.mnl files in the directories specified on the AutoCAD preference support folders.
Steps to clear the virus as follows:
1. Analysis the virus file acaddoc.lsp in notepad or other text editor program.
2. Searching *.lsp and *.mnl files in the APP path and SUPPORT path of AutoCAD. Open the files one by one to delete the appending virus codes beginning with “(setq flagx t)” to end of file.
3. Search acaddoc.lsp files that size are 55kb and delete it.