Magento – Error installing Magento 1.9.1.0

I get the following error message. I am new to Magento and this is my first install. Please help out. Thanks in advance. See detailed error message below.

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Error log record number: 858614085

a:5:{i:0;s:540:"Error in file: "/homepages/29/d527516279/htdocs/app/code/core/Mage/Tax/sql/tax_setup/install-1.6.0.0.php" - SQLSTATE[42S01]: Base table or view already exists: 1050 Table 'tax_class' already exists, query was: CREATE TABLE `tax_class` (
  `class_id` smallint NOT NULL auto_increment COMMENT 'Class Id' ,
  `class_name` varchar(255) NOT NULL COMMENT 'Class Name' ,
  `class_type` varchar(8) NOT NULL default 'CUSTOMER' COMMENT 'Class Type' ,
  PRIMARY KEY (`class_id`)
) COMMENT='Tax Class' ENGINE=INNODB charset=utf8 COLLATE=utf8_general_ci";i:1;s:1008:"#0 /homepages/29/d527516279/htdocs/app/code/core/Mage/Core/Model/Resource/Setup.php(645): Mage::exception('Mage_Core', 'Error in file: ...')
#1 /homepages/29/d527516279/htdocs/app/code/core/Mage/Core/Model/Resource/Setup.php(421): Mage_Core_Model_Resource_Setup->_modifyResourceDb('install', '', '1.6.0.4')
#2 /homepages/29/d527516279/htdocs/app/code/core/Mage/Core/Model/Resource/Setup.php(327): Mage_Core_Model_Resource_Setup->_installResourceDb('1.6.0.4')
#3 /homepages/29/d527516279/htdocs/app/code/core/Mage/Core/Model/Resource/Setup.php(235): Mage_Core_Model_Resource_Setup->applyUpdates()
#4 /homepages/29/d527516279/htdocs/app/code/core/Mage/Core/Model/App.php(417): Mage_Core_Model_Resource_Setup::applyAllUpdates()
#5 /homepages/29/d527516279/htdocs/app/code/core/Mage/Core/Model/App.php(343): Mage_Core_Model_App->_initModules()
#6 /homepages/29/d527516279/htdocs/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#7 /homepages/29/d527516279/htdocs/index.php(87): Mage::run('', 'store')
#8 {main}";s:3:"url";s:10:"/index.php";s:11:"script_name";s:10:"/index.php";s:4:"skin";s:7:"default";}