I'm sorry to be bothering the forum with this, but in all my encounters with FAQ I'm getting gall sorts of other responses but nothing I could find relating to the certificate. I've tried to remove all the existing loaders (there was only one for Windows 7 Ultimate Activator by Tiduz and a KMS I used for Office). I've already tried the ' WAT fix ' solution 2 times and will try it one last time after reinstalling and removed Lord Tiduz's Activator. The problem is that up until now if it's been cleared and restarts, the loader stops after about five second and says " the certificate wasn't successful". If anyone has any ideas on how I can fix this one up. Basically, I've used Acronis to replace a Windows 7 hard-drive on a self-made computer only to discover it's telling me it's no longer valid (although in fact it is; I bought it and installed it - it's not my fault the computer broke down and the C drive needed to be moved a number of times. IN ANY CASE if the WAT FIX solution results again in the " certificate not being successful" I'll have nowhere to turn and the brazen letters on the bottom of my screen telling me my windows isn't genuine. Thanks on the beforehand for any help. Dr Zachar Laskewicz, zachar[at)telenet.be ,