pgikkas,
I’m using Windows 7 64bit and xampp. I’ve successfully removed index.php on my test install using the docs linked above. I did have an issue at first as I have my EE install in a sub-directory of htdocs and needed to make a change to the htaccess to reflect that.
You can see in line 8 that I added /ellislab/fresh/ to reflect the subdirectories I am using inside of htdocs. If you have your install inside a subdirectory could you try that out.
<IfModule mod_rewrite.c>
RewriteEngine On
# Removes index.php
RewriteCond $1 !\.(gif|jpe?g|png)$ [NC]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /ellislab/fresh/index.php/$1 [L]
# If 404s, "No Input File" or every URL returns the same thing
# make it /index.php?/$1 above (add the question mark)
</IfModule>
Please get back to me with the results.
Sean