Ok, well, after nearly 3 days of intermittent reboots on the pc, [bsod, seemingly memory stack errors only happening when online] it turns out there's a possible incompatibility with an update on xp.
update 977165
Had tried everything, hardware, software, memory checks, reseats, cleaning out the motherboard, and eventually got online long enough to realise it was update related, so blocked the the WAU... file in comodo firewall so I could actually search for a solution.
Just in case anyone else has been having fun.
Still don't trust that that was the answer, but will keep my toes crossed that the pc behaves the rest of the night. I've changed windows update to ask me what to install [control panel, security settings] so I can tell it to ignore this update when it decides I want it again
[if you hear a scream later, it'll be me looking at a blue screen while curling up in a small ball and gibbering...]
EDIT:... gibber ...
G>



Reply With Quote
)