Joseph, the thought has occurred to me that you may have a faulty install of PAF 5. Oh, yes, it appears to be working to all intents, but from what you have described there is some sort of conflict gong on within the files in your computer.
Let's look at how you installed. Did you make sure ALL running programs were closed down before installing? That is, did you only have EXPLORER (your Windows program) and SYSTRAY running? You would have used CTRL-ALT-DELETE, highlighted each program in turn, then clicked END TASK until only the above two were left. Then when you installed did you do a normal Windows install? That is, clicked START|SETTINGS|CONTROL PANEL|ADD/REMOVE PROGRAMS and browsed to where you had saved the PAF 5 setup download?
If you have not done all of the above, I would suggest that you backup your data, then delete the current PAF 5. When that is done, follow the steps above to reinstall PAF5.
The reason behind all those steps (for installing any program) is that Windows "shares" files. Thus if you install, while any program is running, that program may just be using a shared file that PAF, or any other program you are installing, needs. This can cause possible conflicts similar to what you are experiencing.
Doing the above steps may solve your problems. If it doesn't, well, at least we know we have eliminated one possible "suspect" in this "case" :-)