Problem when instaling Drupal 6.X with Xampp in VISTA.

drupal 6.14 is not released yet how you are using it?
for blank page issue check your xampp version, is it compatible with drupal 6? Also try increasing your php memory limit.

The same problem happens for me also. please tell me how to increase the PHP memory limit.

http://drupal.org/node/157200

1) Sometimes the blank page could be another problem:

Disable update_status module, this not work in a localhost installation.

2) How to increase PHP memory limit:

http://drupal.org/node/29268

The problem could be where Xampp is installed. The default C:\program files\xammp on vista should be changed due to vista's uac. Uninstall xampp and install to the C drive such as c:\xampp

Then after installing check to make sure xampp is functioning shut it down and navigate to c:\xampp\php, right click on php.ini and change this section

;;;;;;;;;;;;;;;;;;;
; Resource Limits ;
;;;;;;;;;;;;;;;;;;;

max_execution_time = 180 ; Maximum execution time of each script, in seconds
max_input_time = 60 ; Maximum amount of time each script may spend parsing request data
memory_limit = 64M ; Maximum amount of memory a script may consume (16MB)

note: these are my settings (BOLD TYPE), not php's default values

I find memory_limit to be a key factor give it plenty, my preference is 64M

you'll also want to increase the max_execution_time from it's default value to sometime like 180 (5 minutes), xampp and vista can be extrememly slow at times for some reason I'm not sure of but people at the xampp forums have been complaining about this for quit a while

Max_input_time is up to you, leave it or change it.

Now find

;;;;;;;;;;;;;;;;;;;;;;
; Dynamic Extensions ;
;;;;;;;;;;;;;;;;;;;;;;

about 20 lines down you will see

;extension=php_curl.dll

remove the ; to have curl available to php

save the file.

Search drupal for how to change the host file in windows and alias your site in there, you'll have to open wordpad by right clicking and using the run as administrator option to be able to change the host file.

After you change the host file and alais your site (such as mysite.local) you'll need to open c:\xampp\apache\conf\extra and edit httpd-vhost.conf

add to the bottom

<VirtualHost permox.local>
  DocumentRoot "C:\sites\permox"
  ServerName permox.local
  ServerAlias *.permox.local

  CustomLog "C:\sites\permox\logs\example.local.access.log" combined
  ErrorLog "C:\sites\permox\logs\example.local.error.log"

  <Directory "C:\sites\permox">
    Options Indexes FollowSymLinks
    AllowOverride All
    Order allow,deny
    Allow from all
  </Directory>
</VirtualHost>

• DocumentRoot is where your site is on your harddrive, typically C:\xampp\htdocs\"YOURSITE" but could be anywhere such as in my example
• ServerName is the alais you placed in the host file
• ServerAlais should start with a *. so you may create multisites or call your site with or without the www. prefix
• CustomLog and Errorlog are in the c:\xampp\apache\logs directory and you WILL have to create a directory and add then if your not using the htdocs folder to hold your site. Apache WILL NOT RUN without these files.
• Directory should be the same as your DocumentRoot

Now start up xampp and check it out. run phpmyadmin and set up your database, then install drupal. BTW update.php does work on my setup but you have to check for updates manually.