I've had my MacBook since 2006 [and absolutely love it].
I began to upgrade the operating system over the last year and now have Lion OS 10.7.3.
The overall speed is very slow now - even just OfficeMac programs like Excel - opening programs/apps and delays when typing emails or Word docs [even this message....].
Any basic changes I can make [more RAM, etc] without buying a new computer?
Processor = 2GHz Intel Core 2 Duo
Memory = 2GB 667MHz DDR2 SDRAM