After a 13 hour phone call to Dell in India four years ago I purchased an iMac 20 inch screen, 2.66 GHz processor with 2 GB 800MHz DDR2 SSDRAM. I still use Microsoft Word, MSN E-Mail, and many other Windows features. Although I had never backed up data before I recently purchased a G Drive slim USB 500GB hard drive storage module that is the size of an iphone and it backs up daily as an automatic function with "Time Machine", which is part of the iMac computer.
Now for the good part: recently, I purchased a RAM upgrade to 4 GB from "Crucial Memory." It cost $61 and was easily installed on the bottom of the computer by removing one screw, pulling out the 2 GB memory modules and sliding in the two 4GB cards. Voila, it now has blazing speed and there has never been a security issue, firewall purchase, or anything related to a corruption. Also, I just discovered an automatic software repair feature that I didn't know was there.
I am a happy camper; however, I read that there will be a new iMac released later this year that will be another quantum leap. For now, this computer meets my needs and avoids all of the previous Dell PC issues.