Forbidden access only in pc

This is super weird.

When I use incognito mode , the site works perfectly.

When I enter using regular mode, this sign appears:

Forbidden
You don’t have permission to access /wordpress/ on this server.

.
I can enter through my cellphone.

I already tryed changing all permissions from FTP to all directorys
and wont work.

I′ve tryed to put

<IfModule mod_security.c>
SecFilterEngine Off
SecFilterScanPOST Off
</IfModule>

but when I do that I get other error.

This is in my .htaccess file :

# BEGIN WordPress
<IfModule mod_rewrite.c>

RewriteEngine On
RewriteBase /wordpress/
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

What should I do?