A month on and all's well.
Kaspersky's Beta dummy-spits....says it's 'stopped working' whilst it's doing a system scan [some form of false-positive cos it's clearly working...it's doing its scheduled scan.....ah, the joys of Betas].
Just about everything I can throw at it works OK [sometimes only 'ish']. The File/folder tree is quaint...for want of a better word....duplicated and thus confusing references/locations for pictures, downloads, docs, etc.... I wonder if MS can spell 'KISS'.
Trying as hard as I can I've only managed 3 system lockups requiring a reset [and I could kill Win2000 at will, anytime I wanted...and that was supposed to be rock-solid yet I broke it typically twice a day].
If your most frustrating quirk is the mouse scrollwheel only working in one direction when interfacing with WA 2.9x [volume only goes up, not down] then it's a pretty bloody good OS.
I dl'd the 64bit ver of Win 7 ...so next trick is to install that on a second drive and compare performances...and see if I find any driver dramas...