What were you using to view the spreadsheets before purchasing your new computer? Spreadsheets don't run by themselves; the last time I was working with Lotus spreadsheets I had to use the Lotus 1-2-3 spreadsheet program. That was years ago on a machine using DOS. Unless you have a version of Lotus 1-2-3 or whatever that company produced to succeed that program that runs on Windows 7 you will need to keep your old computer to view them.
Windows 7 Forums is the largest help and support community, providing friendly help and advice for Microsoft Windows 7 Computers such as Dell, HP, Acer, Asus or a custom build. I get a monthly listing in my email that comes as a spreadsheet. When I try to open it, I get the message that I do not have Windows Office 2010 installed and it gives.
It is also possible that Microsoft Excel (part of Microsoft Office) or the equivalent Open Office spreadsheet program will import and convert the spreadsheets. A search on the Microsoft Office Support page led me to this:. Try as I might, I was unable to find anything that applied directly to Office 2007. The conclusion I reached is that your best hope is to attempt to save your old spreadsheets in the latest Microsoft Office format that your Lotus program will support. I'm not very familiar with the most recent versions of Lotus, but even the older versions of that program had file converters that allowed you to save the spreadsheet in Microsoft Excel of one version or another. If you no longer have the machine that supported your program, you may be out of luck.