I'm debating getting office 365 with the subscription for the new laptop I'm getting, as well as for updating my PC which is still running Office 2000. I just want to be sure that if I update my PC that I can still open/read/write my old documents that still have the old ".doc" and ".xls" extensions. I'm scared I might loose all I have acquired over the years. Thanks!
Newer software such as Microsoft Office 2013 should be able to read legacy files. so, you will be safe. Office 365 subscription is linked with a Microsoft account, and each account can enjoy up to 30 days of Office 365 subscription for free. So just to be on the safe side, try using the demo first.