I have a number of problems which I suspect have a common cause. I'll list them as briefly as I can and try not to lose my rag as this is simply driving me nuts now and I feel like crying.
Adobe Acrobat - Error 1406 when installing (cannot write value, make sure you have admin etc)
Citrix receiver - gives an error "cannot write value to key [insert key here]. Make sure you have admin privileges etc
Windows update for Office 2007 - KB2817330, KB2850022, KB2878233, KB2880508, KB2881069, KB2984942, KB2596857, KB2825644, KB2817565, KB2920793, KB2863811, KB2597972). Error 57E.
In all cases it seems at first that these are permission issues. However I am also getting the same problem when I am logged in run as administrator. I've tried changing the registry keys to allow access to everyone, I've run countless MS Fixits which have reported no problems, turned off antivirus, antimalware etc.
If anyone can please help with this - I really need Citrix Receiver so I can work from home more so I can look after a sick relative.
Here's a simple tool that will automatically reset all the Registry permissions giving the Administrators' group full control. It's a lot quicker, easier and safer than changing them manually with scripts and Command Prompt. Hopefully it'll fix your problems.
To be on the safe side, before you proceed, set a Windows System Restore point just in case things don't work out as expected and you need to restore your computer back to how it was before you ran that tool. Have a read here if you're not familiar with it.