Installation error

I’m trying to install wordpress again and I get the following error:

Error: The following files already exist:
 /home4/dfontes/public_html/wp-content/plugins/jetpack/_inc/genericons.css
 /home4/dfontes/public_html/wp-content/plugins/jetpack/class.jetpack-options.php
 /home4/dfontes/public_html/wp-content/plugins/jetpack/languages/jetpack-uk.mo
 /home4/dfontes/public_html/wp-content/plugins/jetpack/modules/contact-form/css/menu-alter.css
 /home4/dfontes/public_html/wp-content/plugins/jetpack/modules/contact-form/css/rtl/menu-alter-rtl.css
 /home4/dfontes/public_html/wp-content/plugins/jetpack/modules/contact-form/grunion-omnisearch.php
 /home4/dfontes/public_html/wp-content/plugins/jetpack/modules/debug.php
 /home4/dfontes/public_html/wp-content/plugins/jetpack/modules/omnisearch.php
 /home4/dfontes/public_html/wp-content/plugins/jetpack/modules/omnisearch/omnisearch-comments.php
 /home4/dfontes/public_html/wp-content/plugins/jetpack/modules/omnisearch/omnisearch-core.php
 /home4/dfontes/public_html/wp-content/plugins/jetpack/modules/omnisearch/omnisearch-pages.php
 /home4/dfontes/public_html/wp-content/plugins/jetpack/modules/omnisearch/omnisearch-plugins.php
 /home4/dfontes/public_html/wp-content/plugins/jetpack/modules/omnisearch/omnisearch-posts.php
 /home4/dfontes/public_html/wp-content/plugins/jetpack/modules/omnisearch/omnisearch.css
 /home4/dfontes/public_html/wp-content/plugins/jetpack/modules/social-links.php
 /home4/dfontes/public_html/wp-content/plugins/jetpack/modules/social-links/social-links.php