Calling All Geeks

     So here's what I did.
     Yesterday, I got myself a Toshiba at the local Best Buy with a 1TB HD for real cheap. After nearly three and a half years, my old Lenovo just isn't cutting it anymore. Ergo, despite our financial difficulties, I had to bite the bullet and get an upgrade. Anyway, I ran into a few problems right out of the gate.
     Firstly, this Toshiba, as with so many other computers these days, doesn't come with the full complement of bundled software. Manufacturers finally discovered they could make a shitload more money by stealing that software that we'd taken for granted and replacing it with some shitty Microsoft 365 scam. This is essentially a free 30 day trial whereby they then take away the "freebies" from you, forcing you to buy the software.
     Fortunately, as a writer all I need from Microsoft's Office Suite is MS Word, which I already have on a boot disk I'd downloaded years ago from Frostwire. After initial difficulty, I'd been able to load this on my Lenovo and have been using it ever since. This time around, however, I don't know how to actually load Word 7 on my HD. I have an icon on my desktop but when I double click on it, the program pretends to start to load then doesn't. This computer will be worthless to me unless I can get Word to work. I'd compressed it, unzipped it. Nothing works.
     Secondly, I tried loading my HP printer software on the Toshiba only to discover in the window that pops up just the exit button's shown and not the install button. My Lenovo uses Windows 7 but the Toshiba uses Windows 8 or 8.1, which is radically different from 7. (Actually, I hate it, which leads to another question: Is it feasible to switch out my Windows 8 OS for Windows 7 and will 7 automatically overwrite 8?). The disk I got from HP says it is formatted for Windows 7 but not 8. Is that the sticking point? Do I need to call HP and send me a boot disk formatted for Windows 8?
     Again, if I can't get the new computer to recognize my printer, it's virtually worthless.
     Since I don't know anything about FTP (or File Transfer Protocol), I'm backing up my files slowly Old School by emailing them to myself since my email's internet-based. But I haven't a prayer of opening them up unless I can get Word 7 loaded on my hard drive.
     So any technical advice would be greatly appreciated.
(Update) Rather than confining any suggestions to the comment section, please email me at Crawman2@yahoo.com.
(Update 2)  It seems that after installing the device driver that popped up when I plugged the printer into the Toshiba, the boot disk became irrelevant since it seems to print fine off Notepad. So, my biggest problem is installing Word 2007. Microsoft's "solution" for installing a program off a disk basically told me to do the same thing that's been making me go around in circles for a day.