Sounds like either a Memory problem or a Band-width issue.
If you have a Windows Operating System (I know nothing about Apple), then push the Ctrl/Shift/Esc keys all at the same time. Click on the "Performance" tab for a look at your computer's Memory.
Band-width is a matter of how you are connected to the Internet -- a dial-up connection, for example, would explain your situation. There are a number of online "connection speed" checkers... Google that.
"It's tough to make predictions, especially when it involves the future." ~Attributed to many
"In theory, there is no difference between theory and practice. But, in practice, there is." ~(perhaps by) Yogi Berra
"Those who have knowledge, don't predict. Those who predict, don't have knowledge."~ Lau tzu