Microsoft have allowed for free upgrades from Windows 8 and Windows 7, so why not Vista and XP?
Windows 7 didn’t become public until 22 October, 2009. Computers on sale in stores after this date were of varying quality, some not too good running Vista with full driver support, let alone Windows 7.
Personally, I wouldn’t upgrade a computer of mine unless it was at least a late 2010 release because of patchy to non-existant hardware driver support
XP machines are almost in a different galaxy. As good as some were in their day, without full driver support, one has the modern day equivalent of an 8-bit, 6502 proceesor just itching to show you how good Mode 7 graphics truly are.. 🙂
Years ago, I had a representation of a Dutch street organ, complete with moving parts, and playing Sweet Dreams Instrumental by the Eurythmics. Brilliant stuff, it was too, and all in Mode 7 graphics.
If you have upgraded a pre-late 2010 computer to Windows 7, do NOT assume that all will be well even though Microsoft are telling you that it will/should be. Microsoft hardware specifics are VERY optimistic. I would like to be able to use the word ‘realistic’ but I can’t and nobody can make me say it.
Software you will have to use caution. Old utilities designed for a previous OS should never be run on a later OS unless the author page SPECIFICALLY states that it is OK. Anti-virus suites are utilities, by the way.