I will repeat my words, but you are great, Samuel. At fist i didn’t understand your comment. Later i understood that PHP extensions are in Wamp->PHP->PHP extensions. Now i can install plugins. I have not tried to install a theme yet, but i think i have to be able to do it as i can install plugin.
Thank you very much again!
The problem with the pages appearance is resolved. But i still can not install any plugin or theme 🙁
Samuel Elh, you are great, man. This solved my problem. Thank you very much 🙂