On WinNT and Win2K, MySQL expects the root directory to be c:\mysql (the default when you install using the binary from the MySQL site). If you installed MySQL into another directory, you must place a copy of my.cnf on the c:\ root and specify the MySQL installation directory with the base_dir directive. A samples copy of my.cnf should be in installation directory under the name my.cnf-example. If this is the situation in your case, the reason MySQL cannot start is because the files are missing (at least as far as MySQL is concerned🙂. Hope this helps!!!
Geoff A. Virgo