As Emegra suggests, don’t expect your Windows software to run in Linux … it won’t.
There are ways of getting SOME windows applications to work in Linux through WINE (think of it a bit like an emulator, though in reality it’s a “compatibility layer”), but it can be hard to achieve and usually there are problems.
That said, and again as Emegra suggests, there is nearly always free Linux alternatives.
Web based stuff is “pretty much” platform independent … so your web browsing/email/fekbook/YouTube/BBC iPlayer needs are taken care of.
(there is the occasional streaming service that can be a pain in Linux, but most work without issue or can be worked around … eg. 4OD is currently being a pain IIRC)
Office stuff - there is LibreOffice, and Kingsoft Office which will even read/write Microsoft Office docs … or Google docs (online).
I seriously doubt if the Xacti software will work in Linux, but that doesn’t mean we can’t get the video off your camera and edit it … this may take a little homework, but we’ll figure it out
CD burning - There are a few CD/DVD burning suites in Linux Brasero/Xfburn/K3b
Oddly, specially after what I said previously, the single Windows application I still use occasionally (running in WINE) is ImgBurn … not because there’s no Linux alternative, but just because I rarely use it any more so can’t be bothered to change.
Another 2 options for where you MUST have Windows software would be -
a) to dual boot (where you choose at bootup which OS to boot into)
b) to run Windows in a virtual machine inside Linux (this is probably not an option in 512Mb RAM, but should be OK on a system designed for Win7)
Anyway … burn yourself a LiveCD, or LiveUSB … take Peppermint for a test drive … then if/when you have any questions we’ll be more than happy to answer them