After repairing...Windows 7 should revert back to trial... Use the slic dump toolkit to check slic again.
"Reign_Of_Freedom" has posted the best thing to do now ... several times ...Format. My guess is remnants of a broken loader are still in force .... 1st post states loader was activated for some time...then not activated....so the loader broke...not surprising now trying to install cert and serial not successful. Something is broke, and no doubt traces of loader still present .... Format time ... and don't use a loader when you have a slic 2.1 modded bios installed. Format and use the cert and serial given ... or there isn't any point asking for advice.