I upgraded to Windows 7 on my home desktop a few weeks ago and love it. I would consider a Mac, but they're just so doggone expensive.
Windows and Security ...
About 10 years ago I just arrived at my current job ( Hint: I have an actual degree in Computer Science ) and I then told one of my new co-workers not to get too excited about Windows 2000, since the same flaws and security issues that were plaguing Windows 98 would continue as long as Microsoft did not rewrite the operating system from scratch.
The problem has continued since then and Windows 7 is just as bad as all of the OS’s Microsoft has released before it since the foundation of all MS operating systems has a poorly designed foundation.
While everyone (especially MS) blames applications (IE, Flash, Adobe) for making bad software, the real culprit is the operating system, since it’s primary job is to make sure bad programs don’t do bad things. And another 10 years from now we will still be talking about security issues and Microsoft products.