Also depends on processor speed, amount of RAM (temporary memory) you have, and possibly amount of hard disk space and whether or not your hard drive is optimized (run Defragmenter under Start-Windows-Accessories-System Tools.
Sometimes it can also help to speed up internet if you:
go to Tools on Explorer Page and drop down to Internet Options
Under General Tab, click on Delete Cookies, Delete Files and Clear History. That will free up some of your RAM
Also you may be able to ad more RAM to your computer. Best Buy can help with what you need--not too expensive either.
mksk, July 2005