Ah, Vista was widely disliked - XP may have its niggles, but relatively few big buinesses switched to Vista, which is why Microsoft extended the period of support for XP, and if you hunt around, you can still buy machines with XP.
However, the 'sting in the tail' (entirely down to Microsoft money grabbing) and not to do with the pros and cons of Windows vs OSX, is that to 'downgrade' to XP Professional cost(s) anything from 70 to 140 pounds, unless you are lucky enough to have some Windows XP CDs (which were not as widely available here, compared with Windows 98/98 SE - again a Microsoft decision, not in favour of end users, intended to make piracy more difficult).
Outlook Express used to be 'bundled' with Internet Explorer v6, and seems a more stable product than Outlook (for e-mail, but didn't have the extras they added into Outlook, bundled with MS Office, and aimed at business users).
It was a shame that the company which used to make alternative hardware to run Apple's OS 9 and earlier was hit by a dispute with Apple. If there had been competition, the market share would have grown much faster for Apple users, and brought about cheaper software and other advantages of mass market situations.
Thinking back to when the IBM PC came out, and then later the IBM AT, I am very glad that alternatives came along, giving us lots of choice as consumers. Dell was one of the major cost cutters 15-20 (?) years ago or so. Not long ago, I threw out my 'original' IBM PC (with 192 kB of RAM and 20 MB hard drive, oh and a "Hercules" [mono] monitor... green text on black background).