PC only and this is the XP way (maybe vista way too? Hm?)
Will make a change only in older computer and probably no change at all in new computers!
Some memory will be needed and you can use a portable device with memory in it!
Should also be VERY similar to vista. So if you understand this you should also understand how to do it on vista!
1. Open the menu where you mainly open your things from. It should be in the bottom left hand corner.
2. Right click "My Computer".
3. Click on properties.
4. When it open it may be in general. click on the last bottom one on the right called "Advanced".
5. Click on the first settings which is "Performance Visual effects, processor scheduling, memory usage and virtual memory"
6. Click on "Advanced" again which is in the middle of "Visual Effects" and "Data Execution Prevention".
7. The bottom one you see will say "Virtual memory" which uses hard drive memory as ram! Click on change.
8. Click on the device you want to give Memory from to ram!
9. Make sure that it is on Custom size and then where it says "Initial size (MB):" and "Maximum size (MB):" there should be two boxes next to them and put in how much memory you want to use I think that they have to be the same so like 2000 and 2000 or something! (You can do the same with more than one device!) (Keep it lower than 5000 at the maximum)
10 . Click Ok and Ok again or Apply and it should tell you to restart!
If you have a old computer this should improve performance!