QUOTE(DJ Dave Ireland @ Nov 24 2009, 11:15 AM)

Hi all, I am considering upgrading to a laptop from CD's. Is it difficult to do and what programs are used on the laptop?
Hi Dave,
If you're used to using CD's and want to use a Laptop, then you will almost certainly need some kind of controller. You'll go mad trying to use a mouse & keyboard during gigs.
NuMark offer quite a few options here;
http://www.numark.com/ns7http://www.numark.com/totaldjboxhttp://www.numark.com/omnicontrolOther manufacturers will have their own offerings.
The advantage of getting a hardware controller is that is will be easier to use, and most of units come with some DJ software.
From a software viewpoint, there is lots of choice (in no particular order);
Virtual DJ
Tracktor
PCDJ
OtsAV
(and a few more I've not listed!)
Most of these will allow control from most controllers (check before you buy!)
You may need a better quality sound device than the laptops internal system - but some controllers have a built in soundcard.
You will need some kind of back-up. Hard drives will always fail and this is difficult to predict. At very least, you should budget for at least 1 external USB Drive - but ideally 2.
If you have a spare laptop, bring that to gigs, and ensure you can play your music using that.
Your "DJ" Laptop should also be treated as a tool, and so should be a nice clean install of Windows with minimal other software running.
Ideally, never let it go on the internet and disable wifi & bluetooth when working. There are also some good sites for explaining how to trim out unnecessary services from Windows.
Lots of people use Laptops, and if treated correctly I don't see a big problem. If you plan on using your main and only Laptop for gigs, you will hit problems and a working back-up system will be crucial to avoid aborted gigs.
There are other alternatives. Some CD players will play MP3 CD's, and some allow USB drives to be connected. This would allow you to reduce the number of CD's you carry, whilst allowing playback of traditional CD's.
There is also the complete packeted systems which contain 2 players and a Hard Drive (ie DDS80 and others). These will be less flexible than a PC based system, but should not have the worries about software glitches.
I hope this is of some help!
Jason