PLEASE HELP........Dell Inspiron 1525

Hi Everyone -

I am hopeing that you can help me! I am new to the community and am not sure where to post my question too!

I have a Dell Inspiron 1525 laptop! It has been great up until my brother talked me into switching to windows xp. My laptop came with windows vista.

Since my brother did this, I lost my cd player drives and other parts of my computer that worked before and now dont!

Anyway - My brother in law then told me about windows 7 and how great it was! He gave me the disc and I downloaded it to my computer. I chose the option full install so that everything would be deleted from my computer and it would be brand new sort of speak!

Well that didnt happen. I now have both Windows xp and windows 7 on my computer and i keep getting a pop up saying i have very little recovery d left!!!!!

How can I wipe out my whole computer and install windows 7 only! I guess my quesiton is I dont know where to go to get rid of windows xp...

can someone PLEASE help me!!!

I also need to buy a few of my keys on my keyboard, they are sticking for some reason and I was told I can replace them!!! Where can i do this if you know..

Thank you so much for your time, i truely appreciate it!

Thanks and have a great night....... Annette