I have 4 computers, a brand new HP elite media center , a new Sony Vaio Laptop, a 6 month old Hp media center PC and an old Hp small form factor XP. They all are getting the same errors and running very slowly. I am getting errors about losing my internet connection every few minutes, I can turn on a brand new PC and the first thing it does is "Internet Explorer has stopped responding and needs to close", "settings in internet options keep changing,services are disabled,"Internet Explorer cannot display this webpage" programs that I know the passwords wont let me sign in , they tell me I have the wrong email address or password, computer freezes up,addons will be disabled,DEP will close down computer, errors that either the file is not installed or it is corrupted, my registry will have 100's of invalid paths,or empty registry keys. Computer thinks it is running Mozilla,windows updates wont go in, windows updates is suddenly not installed, windows installer is not installed,application crashes, application crashes, It seems like at times every site I go to or program I open is not responding. The list goes on and on. These are Windows Vista Home Premium, except for the XP which is the one that ran the best even though it is 4 years old, but just recently it crashed completely on me.This seems to happen to my new PC's and they are corrupted within the first week. When I send them in for repair they come back with a new hard drive or CPU or a motherboard and reformatted . The only thing they tell me is that all the drivers and the operating system was corrupted. Then it starts all over again. I get new and different errors all the time . But they all seem to be the same in all the computers at the same time. No one can help me, there are no viruses,spyware or anything anyone can find.I have security and run scans maybe 3 times a day on each one that I am working on. They never have more than a tracking cookie. So After a long year of this I have been trying to get my ISP to help me with the connectivity issue and they now think that I may have a hacker. So they told me to find out. They cant help me, They said they just don't have the resources to check these things out.