Oh happy day!
Brianbud's solution worked for me. All of Alberto's failed. Sorry Alberto!
I bought my first iMac when Snow Leopard was the OS. After I had made some progress up the learning curve I loved it!
I continued going with the upgrades, Apple's Mail, Pages and Numbers (my three most used programs after Safari) and now use Mavericks OS 10.9.2
Mail has been weird since Mavericks: hangups, must use force quit 100% of the time, opens without uaccess to the tool bar and messages - must shut off the whole computer and reboot from scratch; Pages has lost a lot of basic functionality and is a huge pain to use; Numbers is now so cumbersome I am not adjusting well at all.
I put on Parallels and run Windows 8.1 as well. I use Quicken finacial software and they don't make a Mac version.
After my rant about Mavericks being a huge step backward, Win 8.1 is leading the race back to a fubar'd (non-) functionality.
Are Microsoft and Apple sacrificing us old desktop fogies in favour of tablets and iPhones and the like? Or am I paranoid? Is Linux an option?
iMac early 2010 (I think)
OS 10.9.2
Windows 8.1
Parallels
4 GB memory
Intel core i3 processor
Thanks to all who have helped.