ehge
Смотрите записи в журнале Apache (error.log). Опишите что вы устанавливаете и как.

[Fri Jul 02 09:19:29 2010] [notice] Child 2620: Child process is running
[Fri Jul 02 09:19:29 2010] [notice] Child 2620: Acquired the start mutex.
[Fri Jul 02 09:19:29 2010] [notice] Child 2620: Starting 250 worker threads.
[Fri Jul 02 09:19:32 2010] [notice] Parent: child process exited with status 3221225477 -- Restarting.
[Fri Jul 02 09:19:32 2010] [notice] Apache/2.0.55 (Win32) PHP/5.2.9 configured -- resuming normal operations
[Fri Jul 02 09:19:32 2010] [notice] Server built: Oct  9 2005 19:16:56
[Fri Jul 02 09:19:32 2010] [notice] Parent: Created child process 1592
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_cpdf.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_curl.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_dbx.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_fdf.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_filepro.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_iconv.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_ifx.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_iisfunc.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_interbase.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_ldap.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_mcrypt.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_mhash.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_mssql.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_msql.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_oci8.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_openssl.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_oracle.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_pdf.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_pgsql.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_sybase_ct.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_w32api.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php5\\ext\\php_yaz.dll' - \xcd\xe5 \xed\xe0\xe9\xe4\xe5\xed \xf3\xea\xe0\xe7\xe0\xed\xed\xfb\xe9 \xec\xee\xe4\xf3\xeb\xfc.\r\n in Unknown on line 0
[Fri Jul 02 09:19:33 2010] [notice] Child 1592: Child process is running
[Fri Jul 02 09:19:33 2010] [notice] Child 1592: Acquired the start mutex.
[Fri Jul 02 09:19:33 2010] [notice] Child 1592: Starting 250 worker threads.

устанавливал все согласно http://www.php.ru/install/