|Amare sine timore, when you say "breaking up", does the display seem to stop for a while and then resume? If so, I suspect 'buffering'. That's a function of memory. You may not have enough to begin with or what you have may already be in use.|
Try emptying your 'temp' files and see if that helps. You might also take a look at your start menu and make sure you don't have xtras there.
Also, a common ailment is a file called 'index.dat'. It gets read every time and can take quite a while if it’s too bloated. It's like a log file and keeps a record of every site you visit on the web. Empty, it's 32K, but it can grow HUGE. It's a protected file and can't be deleted by normal methods. CCleaner (free @: http://www.ccleaner.com/) can get rid of it when it’s ticked (not to worry, it gets rebuilt EMPTY on the next boot.). May not be your deal at all, but won’t cause any harm to try. I run it often (daily as I mess with LOTS of DLs).
Ed in Texas.