Install issue

I’ve attempted an install of 0.4.2 on my web server (Win2003SBS with PHP 5.2.10, MySQL 5.0.51a) and I’m getting an error part way through the process:

Zend_Session::start() - session_start() [function.session-start]: open(C:\WINDOWS\Temp\sess_1k3hg0msrlf09458cgnkhud4b2, O_RDWR) failed: Permission denied (13)
Backtrace:

#0 E:\Web Files\vanir\piwik\libs\Zend\Session\Namespace.php(116): Zend_Session::start(true)
#1 E:\Web Files\vanir\piwik\plugins\Installation\Controller.php(34): Zend_Session_Namespace->__construct('Installation')
#2 E:\Web Files\vanir\piwik\plugins\Installation\Installation.php(49): Piwik_Installation_Controller->__construct()
#3 E:\Web Files\vanir\piwik\plugins\Installation\Installation.php(57): Piwik_Installation->getInstallationController()
#4 [internal function]: Piwik_Installation->startInstallation(Object(Piwik_Event_Notification))
#5 E:\Web Files\vanir\piwik\libs\Event\Dispatcher.php(213): call_user_func_array(Array, Array)
#6 E:\Web Files\vanir\piwik\core\PluginsManager.php(353): Event_Dispatcher->addObserver(Array, 'FrontController...')
#7 E:\Web Files\vanir\piwik\core\PluginsManager.php(239): Piwik_PluginsManager->addPluginObservers(Object(Piwik_Installation))
#8 E:\Web Files\vanir\piwik\core\PluginsManager.php(154): Piwik_PluginsManager->loadPlugins()
#9 E:\Web Files\vanir\piwik\core\FrontController.php(200): Piwik_PluginsManager->setPluginsToLoad(Array)
#10 E:\Web Files\vanir\piwik\index.php(52): Piwik_FrontController->init()
#11 {main}

It looks like a permissions problem. What do I need to do to fix it?

Check that the web server is able to write to that folder, or edit your php.ini, changing session.save_path to a folder that is writeable.

Thanks, that did it. I changed the directory to one that was globally writable and it completed the install.