I almost bet there is apple software on these systems... heheheeee
that and a few other apps installed wrong too!
Vista will do a lot of stuff wrong - when there is a good reason.
Check your logs for system errors and app loading erors.
If it comes back to some of the system 32 files. Then your Vista needs to be reinstalled.
This time be sure to not just put any apple software or something that was related to the log file reports.
[Inspect the log very well... it is your only key as to why what is in the programming that has gone wrong]
good luck
Look at this link and besure to notice what works and what is said to be compatible...
There is a big difference in the wording. I like the way they fool people with it!
WWW LinkSGT