First there appears to be a problem with the Term, Dedicated Memory in connection to graphics in a Laptop. This is normally associated to the RAM actually on a Video Card and most laptops don’t have video cards, most will have an on-board video chip. To increase Dedicated Memory normally means adding more RAM chips, but most video cards don’t have that ability and it would mean updating the video card.

So we really need to know more about your system, you can get that from something like System Information for Windows (image1), http://www.gtopala.com/siw-download.html, the 2010 version is free for personal use, this gives a whole host of additional information besides Hardware, Video info…

Or this tool (image2) http://www.techpowerup.com/downloads/1930/TechPowerUp_GPU-Z_v0.5.1.html

If you laptop has a video chip then the on-board graphics/video chip shares part of your systems RAM (Shared Memory) and that usually is enough for normal laptop applications and the scree resolution of the laptop. It should be possible to Increase RAM dedicated to video memory.

Check the hits on this http://www.google.co.uk/search?q=Increase+dedicated+video+memory search.