windows live mail won't load correctly

Every time I try to open Windows Live Mail I have to negotiate a dialogue box that I will describe for you below.

First it says Please wait while Windows configures Windows Live Mail.
Then it says The installer has insufficient privileges to modify this file:c:\Program Files (x86)\Windows Live\Mail\mailhc.thm
I am prompted ( twice) to cancel and when I do this (twice) the program loads and runs without a further problem unless I close the program and try to reopen it .

I have tried (successfully) to repair the program in the Control Panel
but this does not fix this annoyance.
As a side issue , the last several times I tried to operate the System Restore program so I don't think I can try this approach unless I can solve that problem.

I have done virus scans with my Norton 360 which is fully updated but it doesn't show up any problem.

By the way I am running Windows 7

I also posted this problem in the Windows Live Mail website but they haven't answered me (there seem to be a lot of posts so you get shunted down the list very quickly)

 

Well, I think you could try uninstalling and reinstalling WLM. You can export your messages and accounts before uninstalling and then import them after reinstalling.

 

thanks
actually the Windows Live Mail website did just answer and they have talked me through a clean install , including Deleting the Windows Live Mail's Registry keys and backing up the program first.
I would be surprised if this doesn't fix the problem.