Permissions in VISTA

In Windows Vista, heightened security prevents you from moving files or folders around (other than in your Profile folders such as Documents, Pictures, etc.) without receiving a confirmation prompt.  The confirmation prompt can be annoying from time to time, but only takes a moment to click through and hit Continue.  If you are planning on moving a lot of files and folders around at one time you might want to temporarily disable user account control which is what is bringing up these prompts.

Simply go into the control panel and type UAC in the search field in the upper right to find the correct control panel to disable UAC.  I strongly recommend turning this feature back on when you're done however as disabling it severely cripples Vista's heightened security.

The warning comes from the new feature of Vista called User Account Control.  Some people will tell you to turn it off in order to bypass problems like the above.  I personally think that is a bad choice, because User Account Control is one of the features introduced into Vista by Microsoft to protect your system from viruses, trojans, and other malware which try to destroy your system.  This page has some advice on your particular error message:

http://paulstamatiou.com/how-to-quickie-vista-permissions

Certainly User Account Control in Vista is a headache.  It has been improved a lot in Microsoft's newest OS, which is Windows 7, becoming available to the public on October 22nd.  In the meantime, do as I do, which is use this free program:

http://www.tweak-uac.com/what-is-tweak-uac/

What is TweakUAC?
TweakUAC(TM) is a free software tool that you can use to quickly turn UAC (User Account Control of Windows Vista) on or off, or to make UAC operate in the quiet mode:

Using TweakUAC is extremely easy: just download and run it, then select the desired option on its window and press OK:

Turn UAC off
This option turns UAC off completely. If this is what you want, select this option, press OK, restart the computer, and you wont see the elevation prompts anymore. Windows Vista will operate pretty much like Windows XP does when you login to its administrators account.

Switch UAC to the quiet mode
This option does not turn off UAC; instead, it only makes UAC to operate in the quiet mode. In the quiet mode, UAC does not display the elevation prompts for the administrators. That is, when you attempt to do an administrative task, you will be allowed to proceed automatically, without prompting you to confirm the operation. All other features of UAC would still be enabled: the programs will run with the standard user permissions by default, and the standard users will still see the elevation prompts (the quiet mode applies to the administrator accounts only).

Leave UAC on
If you have previously turned UAC off or switched it to operate in the quiet mode, you can use this option to restore the original behavior of UAC.

Note that if you turn UAC off or switch it to operate in the quiet mode, Vista starts displaying a warning message in its taskbar. You can turn that message off, though: double-click on the shield icon in the taskbar to open Windows Security Center. Then click on the Change the way Security Center alerts me link, in the left panel. Finally, choose one of the Dont notify me options.

Note also that if you have used the Local Security Policy tool of Windows Vista to change the advanced configuration options of UAC, they will not be affected by TweakUAC; you would have to use the Local Security Policy tool to modify them.