I seen all the hotfixes also...went through them and possibly there is something that will fix it. I did have this error this morning:
6.3.0.0 Hotfix CS151473 - 5734 - Added Hotfix Error Count warning message, as follows: 2 hotfixes failed to apply. Locked files may have blocked the new hotfix from installing. Retry by clicking "Get Latest Hotfix". If the error remains, reboot the server to unlock the files and click "Get Latest Hotfix" again.
I did "Get Latest Hotfix" again and the message went away and when I search for updates no more hotfixes are found. So hopefully they just didn't apply right the first time and this will fix it. I am having the tech test now. I did not reapply schema after hotfixes were run.