|You didn't post specs.|
Depends on programs. Most windows programs can only be used one at a time for the most part. That relies more on ram to hold your data between windows.
CPU and the graphics card tend to be needed more for complex tasks such as games, edits to video and audio, database or complex photo edits or cad programs.
Post the model.
Why did it take me over a year to phone in a problem to ATT?