Analyzing the problem that Win7 XAMPP apache cannot start_PHP tutorial

After downloading the installation version of xampp on Win7, apache cannot be started. The phenomenon is that the running sign is displayed briefly and then stops. The log shows WARNING: terminating worker thread 0.
View log information
[notice] Apache/2.2.17 (Win32) mod_ssl/2.2.17 OpenSSL/0.9.8o PHP/5.3.4 mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations
[notice] Server built: Oct 18 2010 01:58:12
[crit] (22)Invalid argument: Parent: Failed to create the child process.
[crit] (OS 6) handle invalid. : master_main: create child process failed. Exiting.

Need to turn off 6. mod_perl module
# Perl settings
#Include "conf/extra/httpd-perl.conf"