Your XP sysstem will not stop working after April, it is just that MS will not be issuing any more updates so you have planty of time. If you wish to upgrade then your cheapest option is a Linux distribution, Ubuntu, Mint etc. If you must stick with Windows then you should look around at alternatives on eBay (watch out for fakes if they are too cheap. You might find a Win7 one there. Don't know the spec of your laptop so check it will run Win7 first using the MS upodate checker. Whatever you do will require an absolutely clean install so you will need to make an nexternal backup of all your data.