When was the last time you vacuumed inside your computer?
You probably have a computer since you're reading this. You might have a cat, dog, or other furry beast which also lives in that same space. When was the last time you cracked the lid of your machine to see just how it's doing in terms of airflow? Unless you've gone to great lengths to keep fur, dust, and random flying things out of your machine, it's probably not nearly as good as it was when it was new.
Do yourself a favor and take a look. You might avoid some needless anomalies that way. Keep it clean and that's one less thing to worry about.
This has been a public service announcement from someone at the intersection of cats and computers. Have a nice day.