Well after one week of waiting i finaly tryed that solution to update my windows to 8.1 ->
http://www.neowin.net/news/here-is-how-to-get-the-windows-81-iso-and-create-a-usb-install-stick
Using that trick and that workaround (with general serial) to install 8.1 is the worst way i never used to upgrade my system. Thank microsoft...
Anyway for the who whant to try, i simply choosed usv stick way and then when the stick with the update is created i have launched setup application. In the menu i choosed to keep all my data and apps and it worked.
After 8.1 installation i activated my copy with purchased windows 8 key that i used before.
Entire process take me about 2 hours.
Cyberium. Can you say if you had word or office installed before you did this.