Their has been problems with the 500 mhz computer since the internet explorer crashed when the googlw earth was almost completely downloading and tried to be ran. It's been running very slow and was running at 100% computer usage all the time but yesterday their has been an unknown performance improvement. It runs hard then runs normally then runs hard then runs normally constantely. But the computer was runing over 3 times as quick and was not always running at 100% so i am wondering what caused the performance increase. Nothing was changed.