Your problem is that for some reason, the system is unable to properly read the SLIC table in the BIOS, which is required to be able to self-activate the OEM_SLP Key with which the computer came
installed.
The normal solution is to change the Key to the one on your COA sticker - but you say that you are unable to read the Key there.
In such circumstances, the only things you can do are
1) recreate the Licensing Store - in case it's a minor software problem causing the misread
2) try updating the BIOS to the latest available Vista-compliant one, from the manufacturer's website
3) Contact the manufacturer direct, and see if they can provide assistance to correct the SLIC table
4) a reformat and reinstall using the manufacturer's recovery media
5) purchase a new license for Windows (or a new computer)
There *may* be an alternative solution though, if you are patient and persistent.
Attempt Telephone Activation, and speak to an operator - they will tell you that your current Key
is blocked (they should then ask for confirmation of your Product Key). Explain
to them your problem, that you need to change the Key to the one on your sticker,
but that the sticker is unreadable (could they please supply a replacement
Key?). Hopefully they will ask for documentary proof of the sticker, in the
form of an email with a picture of the affected sticker - and you can proceed
from there.
Sometimes it takes two or three calls before you get an operator who actually knows and uses
this procedure - but I know that it can and does happen.
