So, the only strange thing i did was, removing my cmos battery, the time was reseted.

I adjust the time on bios and windows and when i sign in to windows live messenger
I can’t see my contact online, all offline, they can see me and send me message, but i can’t reply

to fix it, make sure your hidden folder is visible

01. Sign out, exit from windows live messenger

02. Open this folder C:\Users\[Your windows username]\AppData\Local\Microsoft\Windows Live

03. Delete folder Contacts

Run windows live messenger, sign in again, everythings should be back to normal again