Windows 7 Home Premium on 64 bit, Satellite P875-S7200 6gb RAM 511gb Free, 170gb used. Lightweight use for browsing, office type apps, cell phone sync music. Just want to know if my laptop will handle it or any known issues. thanks
Thing is - Ubuntu - or some of it's flavours - is downloaded as Live-CD iso's. That is you can boot up and actually use Linux without acually installing it, and without touching the contents of other storage units (unless intentionally used to access other drives).
Just be aware that booting from CD/DVD or USB2 make it very slow compared to when it is installed on disk.
Anyway - the most important thing is to make backup of your files.
Another thing I recommend is to take disk image backup of previous system (windows and all files) onto a external hdd in case you would like to change back. You can use Clonezilla to do that.