I have just installed the new AntiVir (virus scanner) and let it run. It
says that texmf\source\fonts\malayalam\preproc\mm.exe has an invalid
exe-header and might be destroyed by malware.
I think this is a wrong message, but I do not dare to execute this file and
I have renamed it now. The date of this file is the same as the other (human
readable source-) files of this directory. But how can I be sure whether
this file has been corrupted or not?