Zing

its not always possible to add ram to systems. Plenty of Socket A motherboards for example can only support 2x256 meg of ram.

Systems over time have lots of programs added and quite often these have start up elements that run in the back ground when then system boots up. These all swallow up available ram so stopping them auto start up helps.

In short just saying add more ram is not very helpful and it most certainly is not the only option