I installed upgraded from Windows 7 starter to Windows 7 Home Premium on my samsung n130 netbook. I typed in my key and it says it's invalid. I try to do slui 4 but it doesn't take me to the phone activation, it takes me to the screen with the options, and it doesn't say show me other ways to activate, nothing gives me an option to get it activated, just an option to retype the key, which I've done numerous times. when I type the key, it says error 0xC004E003 and it won't let me activate. I have 2 days left to activate. How do I get it activated. If I need to contact microsoft, I'd prefer to chat online as in instant message, or if not, then email. I got the key from microsoft. it is a windows 7 home premium key because I used a checker to verify it. I also need to talk to microsoft about two keys they gave me that were not home premium keys exactly, they were home premium N edition keys, which don't work with regular home premium software. Any help? Thanks in advance. I appreciate it.