If you are using the most recent version of Microsoft's Internet Explorer, you are likely to have a yellowish band with a picture of a keyhole at the left side suddenly appear across the top of the screen with the following intimidating message:
"To help protect your security, Internet Explorer has restricted this file from showing active content that could access your computer. Click here for options…"
Your cursor may also have a picture of the keyhole attached to it.
If this happens, you will need to click on the yellow bar. When you do so you will be given the option to "Allow blocked content." Click on it. A dialog box will now appear reading as follows:
"Allowing Blocked content such as script and ActiveX controls may be useful, but active content may also harm your computer.
Are you sure you want to let this file run active content?
The strip (and the keyhole on the cursor) will vanish and the page will be redisplayed to show the material that was being suppressed.
Please be assured that no page on this site is able to "access your computer."
Once you have granted your permission for one page, my impression is that it applies to the rest of your Internet session. Unfortunately, it apparently does NOT apply to secondary information windows, so every time you click a link that opens a secondry window, you will have to deal with the same Microsoft rigmarole.
I apologize for the inconvenience.
(The problem seems not to occur with other browsers. You may wish to change to Google Chrome, Safari, Foxfire, or Opera until Microsoft becomes a bit less paranoid. All are free, just as IE is. If it is any comfort, I have stopped using IE as a development instrument because this absurd warning is ALWAYS activated when the original page actually resides on the same computer that is displaying it.)