Fix for Magento Admin Login not working on Localhost

When you want to install magento in your local machine by either wamp server or by Xamp server then you will face a problem, while logging into magento admin panel, after successfull install.
Here are the fix to logging into magento.This fix work above Magento version 1.4.1
Go to the location app/code/core/Mage/Core/Model/Session/Abstract/ and open Varien.php then go to line number 86. There you will find the below code. if (!$cookieParams['httponly']) {
unset($cookieParams['httponly']);
if (!$cookieParams['secure']) {
unset($cookieParams['secure']);
if (!$cookieParams['domain']) {
unset($cookieParams['domain']);
}
}
}
if (isset($cookieParams['domain'])) {
$cookieParams['domain'] = $cookie->getDomain();
}


Comment this code, then your code will look like this

/* if (!$cookieParams['httponly']) {
unset($cookieParams['httponly']);
if (!$cookieParams['secure']) {
unset($cookieParams['secure']);
if (!$cookieParams['domain']) {
unset($cookieParams['domain']);
}
}
}

if (isset($cookieParams['domain'])) {
$cookieParams['domain'] = $cookie->getDomain();
}*/

Save the file and Refresh your admin panel page and try to login once again , Now you will be able to login to your Admin Dashboard