I have an original release 60 gig Playstation 3. I recently upgraded the hard drive to a 500 gig. Everything went fine and the system runs fine for hte most part, but every now and then I get a pause for anywhere between 1/2 second to maybe 1 1/2 to 2 seconds. It's really annoying, especially when I'm online. Also, I tried to play Uncharted 2 last night, and it had an update I had to download. When I clicked "ok" it would tell me to wait. After a couple of seconds the system would beep three times and restart. It did this three times in a row. I can't play it now because I can't update it. Anybody know why it's doing this and how to fix it?
Yes, I did the full backup and restore from the old drive. I did everything the way it's supposed to be done to get back to exactly the way it was before the drive swap.

Did you back up the old HDD and restore it on to the new one?
If not, I would start there.

take the hard drive out and put the old one in