Error when I try upgrading to 4.22

[nfountai]

I am having a similar problem today. I upgraded this morning from Vista to Windows 7 Home Premium, I updated Windows and all the suggestions from MTU. Before I did all this I un-installed 4.22 from my computer. Re-installed 4.0 with the correct code. Than I would start Hoster and it would tell me it had to close after about 30 seconds. So, I tried to re-install 4.22 and it tells me I have the wrong code. 4 hours before I was using it.
I had upgraded to 4.11, 4.20 and than 4.22. using the same code. Got any ideas?

I did re-download 4.11, 4.2 & 4.22

Thanks