1 Answer

Are you using a complex screensaver - it runs in the background and eats memory. I had fun with mine, then changed it to blank. 
- How many programs do you load at startup? Maybe you should check it out and ensure you are running just what you need. 
?To do this: cl Start, cl Settings, cl Taskbar and Start Menu. 
?cl Start Menu, cl Customize, cl Remove. 
?cl the icon for the program you wish to remove 
?then cl Remove. 
?This will prevent the program from loading at startup, but will not remove the program from the hard disk. 
-Are you in a large file? If so, save frequently to restore full memory access. (Your work remains in memory until you “save” it to disk. 

1.Did you run an error check? Open My Computer, 
Right-cl on C:, Select Properties, Tools – Run an Error Check ( checkmark “check all and fix); then run a Defrag 

2.Are you using Yahoo Toolbar? Run a full Norton Antispy. 

3.From IE, click Tools, Internet Options 
delete cookies 
delete files (offline files) 
clear history (set days to save to 0 if you want) 
click o.k., and Restart 

3.click Start, Programs, Accessories, System Tools – run Disk Cleanup 

4.click Start, Run ipconfig renew (type ipconfig space renew) 

All these things should be done regularly. The more frequently they are run, the less time they take. 
-Note: Games and videos are mostly graphics. Graphics create large files. If this doesn’t help, you should consider getting more memory.

Source >>> http://au.answers.yahoo.com/question/index?qid=20061130160816AAfjCNv