I had millions of lines of crap notices with my fresh install and here is what i found:

Notice: No prefix specified in import_request_variables() - possible security hazard in c:program filesapache groupapachehtdocshtmlmainfile.php on line 23 

Notice: Constant _youhave already defined in c:program filesapache groupapachehtdocshtmllanguagelang-english.php on line 158 

Notice: Use of undefined constant admin - assumed 'admin' in c:program filesapache groupapachehtdocshtmladmin.php on line 16 

Notice: Use of undefined constant admin - assumed 'admin' in c:program filesapache groupapachehtdocshtmlmainfile.php on line 88 

Notice: Constant _yes already defined in c:program filesapache groupapachehtdocshtmladminlanguagelang-english.php on line 24 

Notice: Constant _no already defined in c:program filesapache groupapachehtdocshtmladminlanguagelang-english.php on line 25

Solution: The error level for the reporting is too high. Set display_errors to display all errors, except for notices in your php.ini. Edit php.ini with a decent text editor as follows (the important line is the last one, which is the only uncommented one):

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; 
; Error handling and logging ; 
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; 

; error_reporting is a bit-field.  Or each number up to get desired error 
; reporting level 
; E_ALL             - All errors and warnings 
; E_ERROR           - fatal run-time errors 
; E_WARNING         - run-time warnings (non-fatal errors) 
; E_PARSE           - compile-time parse errors 
; E_NOTICE          - run-time notices (these are warnings which often result 
;                     from a bug in your code, but it's possible that it was 
;                     intentional (e.g., using an uninitialized variable and 
;                     relying on the fact it's automatically initialized to an 
;                     empty string) 
; E_CORE_ERROR      - fatal errors that occur during PHP's initial startup 
; E_CORE_WARNING    - warnings (non-fatal errors) that occur during PHP's 
;                     initial startup 
; E_COMPILE_ERROR   - fatal compile-time errors 
; E_COMPILE_WARNING - compile-time warnings (non-fatal errors) 
; E_USER_ERROR      - user-generated error message 
; E_USER_WARNING    - user-generated warning message 
; E_USER_NOTICE     - user-generated notice message 
; 
; Examples: 
; 
;   - Show all errors, except for notices 
; 
;error_reporting = E_ALL & ~E_NOTICE 
; 
;   - Show only errors 
; 
;error_reporting = E_COMPILE_ERROR|E_ERROR|E_CORE_ERROR 
; 
;   - Show all errors except for notices 
; 
error_reporting  =  E_ALL & ~E_NOTICE

Make sure you change the one in C:\windows
_________________
Regards
Chris Karakas
http://www.karakas-online.de/
http://www.karakas-online.de/forum/viewtopic.php?t=221
http://phpnuke.org/modules.php?name=PHP-Nuke_HOWTO&page=lots-of-notice-lines.html