Hi Jana,
Welcome to AC and the AC forum. Sorry about your issues. A few questions.
1. What is the processor speed and RAM in the main computer?
2. Are they all XP Pro
3. Is it wireless or wired?
4. How many computers are on the network?
5. How many users are accessing the AC database?
6. Are you using any hardware such as a hub or switch?
7. What is the main computer used for other than hosting AC?
