Q When I use the Internet, I occasionally get messages labeled "Internet Explorer Script Error." A recent one read "SymRealWinOpen is undefined" followed by "Do you want to continue running scripts on this page?" Whether I select yes or no, nothing changes. I can't find any help in the PC-based help sections provided by Microsoft and Hewlett Packard. What's wrong?

A Several complaints identical to yours have been reported to PC help websites, and the consensus answer is that this problem is caused by software on your PC that blocks pop-up advertising. But there is an easy work-around in which you can tell Internet Explorer to ignore these error messages.

When using Internet Explorer, click on "Tools," then choose "Internet Options." Select "Advanced," then search through the list of functions for the phrase "Disable script debugging." Click on the box next to the phrase; a check mark should appear. Continue down the list until you find the phrase "Display a notification about every script error." The box in front of it will be checked; click the box to make the check mark disappear. Click "OK."

If this doesn't solve the problem, the cause might be spyware or adware on your PC. Scan your computer with free anti-spyware programs "Ad-Aware SE Personal Edition" or "Spybot -- Search & Destroy" that are available from www.download.com .

Paul Linnee of Minneapolis has two digital cameras, a Canon S200 ELPH and a Panasonic DMZ-FC3, that create video clips in different file formats. He wants to combine the movies from the two cameras using a program called Windows Movie Maker but finds that software won't read the QuickTime movie file from the Panasonic camera.

He wonders whether there's a way to change the formats used by the Panasonic camera or Windows Movie Maker, or if the QuickTime movie can be converted into a format Movie Maker does recognize.

Microsoft says that neither the Panasonic camera nor Windows Movie Maker can change to different file formats. But the camera's QuickTime movie file can be converted to the "AVI" or "WMV" formats that Movie Maker uses. Microsoft warns that converting from one format to another often lowers image quality.

Check out two conversion products, the "Alive Video Converter" at www.tomdownload.com / and the Blaze Media Pro at www.blazemp.com/mov_converter_software.htm . Both convert QuickTime to the AVI and WMV formats.

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