I use firefox as my browser, but I'm sure Ie8 has the same function, find your passwords, then take screen shots of each page, save them to a file you can easily open, I used PowerPoint, then save them to a disk or cloud, or print them off, that was the easy bit.
I had loads of extra applications, some I rarely use (but didn't want to lose), that I had purchased, so if you have similar, make sure you can access your confirmation emails for these, if they're only on your machine, then setup a hotmail account or similar, and send them there. When you then re-install, you still have access to the various keys you need, this was a major ballache for me, but I've no idea if you have any/many, so it might not be so bad.
I'm still finding stuff now, 2 months on, that I want to use, but have lost, so I have to reinstall, but when I do I have all the things I need stored separately.
Windows 10 is probably the biggest ballache I've had in all my time using computers (a long time), and almost everyone I know has had some issue or other with it, many are fine with the odd issue, some not, but the only real solution, is to buy a new machine that was designed to use it (or find another operating system than windows, so you don't get shafted by them again).