Problems with integrity of network packages, also some routers do not handle properly port forwarding.
It would be better to say, 'I am forwarding this mail, for your information.', or 'We are forwarding this mail for your information.'
what would cause my navigation system to quit
The phone is probaly already shorted out and nonfunctional, changing the battery would likely do nothing as the damage is already done.
I had Battlefield 2 running and working perfectly on my Windows Vista Ultimate Edition so I assume it would work.
A loose wire would cause the horn to stop working on your Dodge Avenger 2.4L engine.
The normal cause is a blown fuse.
Faulty light bulbs, damaged engine.
issue with common ground.
heating element stopped working
It could be that the window motor has stopped working.
what can cause my speed odometer to stop working, it would work awhile, than stop, now not at all
No good is perfectly elastic: if it were, any raise in price would cause exactly zero units of the good to be demanded, and any drop in price would cause infinite units of the good to be demanded, which is not possible. Some goods are very elastic, however, like goods with close substitutes (Pepsi and Coke are good examples).