关于在examplep localhost中安装magento的问题

我第一次在examplep localhost上安装magento，当我输入DB详细信息并单击"继续"时发生错误，错误为：

There has been an error processing your request
Exception printing is disabled by default for security reasons.
Error log record number: 798243806

我检查了phpmyadmin，在magento DB中创建了85个表。

我还在php.ini中检查这些行

extension=php_mcrypt.dll
extension=php_curl.dll
extension=php_pdo_mysql.dll
extension=php_pdo.dll

它们在php.ini 中也没有注释

编辑：我也检查了这个文件var''report''798243806这里是我不理解的书面文件

a:5:{i:0;s:210:"Error in file: "D:'xampp'htdocs'magento'app'code'core'Mage'Catalog'sql'catalog_setup'install-1.6.0.0.php" - SQLSTATE[42S01]: Base table or view already exists: 1050 Table 'catalog_product_entity' already exists";i:1;s:950:"#0 D:'xampp'htdocs'magento'app'code'core'Mage'Core'Model'Resource'Setup.php(645): Mage::exception('Mage_Core', 'Error in file: ...')
#1 D:'xampp'htdocs'magento'app'code'core'Mage'Core'Model'Resource'Setup.php(421): Mage_Core_Model_Resource_Setup->_modifyResourceDb('install', '', '1.6.0.0.19')
#2 D:'xampp'htdocs'magento'app'code'core'Mage'Core'Model'Resource'Setup.php(327): Mage_Core_Model_Resource_Setup->_installResourceDb('1.6.0.0.19')
#3 D:'xampp'htdocs'magento'app'code'core'Mage'Core'Model'Resource'Setup.php(235): Mage_Core_Model_Resource_Setup->applyUpdates()
#4 D:'xampp'htdocs'magento'app'code'core'Mage'Core'Model'App.php(417): Mage_Core_Model_Resource_Setup::applyAllUpdates()
#5 D:'xampp'htdocs'magento'app'code'core'Mage'Core'Model'App.php(343): Mage_Core_Model_App->_initModules()
#6 D:'xampp'htdocs'magento'app'Mage.php(684): Mage_Core_Model_App->run(Array)
#7 D:'xampp'htdocs'magento'index.php(87): Mage::run('', 'store')
#8 {main}";s:3:"url";s:9:"/magento/";s:11:"script_name";s:18:"/magento/index.php";s:4:"skin";s:7:"default";}

我不知道问题出在哪里。请帮我

或任何其他安装教程。