I don't know about anyone else, but every time I try to get into this forum my computer either tells me it doesn't exist or is unavailable. I have to try five or six times throughout the day to finally sign in.

Does anyone else have this problem, or know how to fix it?

no, i don't have that problem. just keep trying i guess

It's been working fine for me as well. I assume you've tried rebooting your computer, right? When it happens, can you access other sites like say amazon.com and yahoo.com, or do all sites stop responding? Could be an issue with your ISP. Next time you can't connect, ask a friend or neighbor to try and if they can get in. If it works for them and they're using a different ISP, then that might be the problem.