Fra Medical Informatics Engineerings FAQ om AlternaTIFF.
Måske kan du kun bruge det til at blive bekræftet i, at der er et problem. Det er herfra
http://www.alternatiff.com/QuickTime runs instead of AlternaTIFF.
Update (July '09): It appears that the current version of QuickTime (7.6.2) may have a flaw that causes the "MIME Settings" feature to fail to work correctly in Windows Vista. It presents a list of file types (the wrong list?) but doesn't allow you to unselect anything. This is a particular problem for users of Firefox and other non-IE browsers. We are investigating this issue, but at this time we do not know of any simple, reliable solution. You could try to get help on the QuickTime discussion forum. If you don't need the QuickTime plug-in, and have good computer skills, you could locate and delete the npqt*.dll files as described here.
Unless you configure it not to, QuickTime may register itself as your TIFF file viewer, thus disabling AlternaTIFF.
The following instructions describe how to configure QuickTime to not handle TIFF files. Note that some versions of QuickTime are slightly different. Very old versions (before 4.1) are very different, and you might consider upgrading or uninstalling.
From the Start menu, select "Control Panel".
[Windows XP] If it says "Pick a category", click "Switch to Classic View" at the upper-left.
Double-click the "QuickTime" icon.
Click the "Browser" tab, or from the drop-down list, select "Browser Plug-in". Click the "MIME Settings" button.
Double-click the "Images ..." item to expand it.
If the "TIFF ..." or "image/tiff" item is checked, uncheck it.
Press the "OK" button, then close the "QuickTime Settings" window.
If you've already installed that ActiveX version of AlternaTIFF, and that doesn't re-enable it, proceed to this question.
If you're using Netscape or a Mozilla-based browser, and having trouble disabling QuickTime, this item may also be useful.
If you have a problem with QuickTime that this does not resolve, check with Apple for support options.