Just installed Windows 8 in my wifes 4 year old laptop computer that had the Vista program. We had been having problems with printer commands since we got this PC. Many people don't like it, but after installation, I found that Windows 8 has a icon named "Desktop". Click on the desktop, and lo and behold, up pops the same familiar Windows Vista and Windows 7 screen.
It will take several hours to update, with a requirement to stop by the computer every 15 minutes or so to check on progress.
Do note that you might have to re-install some software, it's surprising that Microsofts own MS Word, Access, Excel and Desktop Publisher had to be re-installed.
Right now, today is the last day. You can download Windows 8 directly from Microsoft for $39.00 plus tax. Their offer expires today.
Retired and the days are just too short, busier than ever!