So i arrived from work to my home. Turned on my PC, logged into Windows and without touching anything i ran my XP. Got greetings from Gizmo, entered my usual credentials and vo'ila - activated my license succesfully and without any hassle. It really must been some transport route issue like i mentioned before or there is also high possibility it was something between Windows and everything else . Really didn't touch anything since yesterday's issue.
Yippie-ai!
@Cameron thanks once again for your help and all the attention!