I get the error after installing

I am using Windows hosting. I am using Avira theme. My website is slow. I installed wp super cahce plugin. And..

I’m getting the following issues. Can you help me?

Error: Configuration file /wp-content/wp-cache-config.php is missing. Please reload the page.

Error! Could not update/wp-config.php! WPCACHEHOME must be set in config file.
Error! /wp-content/advanced-cache.php not found or not update.
If it already exists, please delete the file first.
Make /wp-content writable using the chmod command through your ftp or server software. (chmod 777 /wp-content) and refresh this page. This is only a temporary measure and you’ll have to make it read only afterwards again. (Change 777 to 755 in the previous command)
Refresh this page to update /wp-content/advanced-cache.php
If this does not work, make sure that the /wp-content/advanced-cache.php file does not exist:
Open \wp-content\plugins\wp-super-cache/advanced-cache.php in a text editor.
Change the text CACHEHOME to \wp-content\plugins\wp-super-cache/
Save the file and copy it to /wp-content/advanced-cache.php and refresh this page.