File saving problem with new Windows 7 installation

I have been using various desktops with XP Pro installed for years and have never had many issues or needed to spend much time changing many system settings as my needs have been reasonably straightforward.

I use my PC with MS Office, e-mail and Internet browsing.

I have just purchased a new Desktop with Windows 7 Pro SP1 - 64 bit and have set up the system with a single user as a password protected Administrator.

I have also bought an External Hard Drive (LaCie 1TB) which I installed this morning.

There are some engineering files that I would like to be portable.

I have created a new folder on the External Drive without issue and can save Word 2007 and Excel 2007 files without problem.

I have a PDF file from a website I opened with IE10 that I would like to save to this folder but when I select 'save as' from the IE menu I receive the following message:

'You don't have permission to save in this location.
Contact the administrator to obtain permission.
Do you want to save in the 'Chris' folder instead'

I assumed that I had logged on as the administrator - which may not be the best practice.

I have searched the web and this seems to be a common issue with Windows 7 but so far I have not found a fix that I have understood.

I am currently running Norton Anti-virus but don't see why this should be an issue.

Is there a simple fix?

Thanks

Norton bloatware could be responsible as removing it solves many problems we see here. I notice you also have AVG which is not recommended by anyone here since it bloated up years ago. For best performance with least problems I would use Microsoft Security Essentials with the Win7 firewall.

Make sure the external HD also has all permissions ticked on its Security tab for your Admin Account. You may also need a setting changed in IE10 Options Security tab.