Thanks. They can say it any way they want, but I can attest to the fact that almost every time I have to run something with QuickTime, it causes problems. I refuse to submit to such garbage. Do a Google search on "Quicktime" and "problems" and see what others have found. The Apple fanatics like to blame Microsoft. You and I both know that Apple isn't perfect, and the only reason they have fewer problems is that the hackers know there isn't enough market share to cause a major problem by attacking Apples.
A Google search of "Quicktime Problem" +PC returned only 684 hits... many of which are duplicates or links down a thread on the same issue. That hardly seems to be a pervasive problem. changing the word "problem" to "problems" only increased the hits to 1200.
I suspect you have a software/hardware incompatiblility where Quicktime on your system is clashing with either hardware on your system or some other piece of software is not releasing a system resource so that Quicktime can use it. In the past there have been known issues of conflicts with RealPlayer and its components.
Most issues with Quicktime on PCs were caused by an incomplete or failed initial installation. Try removing it completely and then re-installing it with the latest version.
I haven't specifically had compatibility problems with QuickTime, but I avoid installing it because when I have it insists on installing shortcuts on the desktop and in my QuickLaunch bar and it insists on running a component at startup (which sits in the tray), apparently to check for updates. And if you try disabling the startup item with msconfig, it comes back the next time you use QuickTime. At least that's what I recall.