Can I increase RAM of my Laptop?
 

The RAM of my laptop is 1GB. I can't use virtual machine becz it is very slow.
Is there any means of increasing it and if so how much it may cost?

Spell out your words, please. And how can anyone here answer your question, when you provide NO DETAILS at all? What brand/model of laptop for a start. And why don't you just go look at the manual for your laptop, and find out how much RAM it can take? After that, go look up how much it will cost for yourself. We can't (and won't), go searching for the best deal for laptop RAM for you...