Just increased memory & and replaced c-drive with a larger drive.
I cloned the c-drive to the new drive using another Acronis on another pc.
Once it was all put back together,and plugged in & switched on it all worked.
After a few hours I did a restart, the Intel Pentium 4 logo flashes up, then the screen with the hard drive details showing at the top, with device listing underneath..... then it just hangs there with the fan whizzing away, nothing else happens.
Have tried powering off, unplugging, leaving for a few minutes then trying again - but still the same.
Had to stop for lunch, but pleased to say it is now working again with the original C drive installed.
The new drive I had installed was a new 2GB WD sata drive. The size shouldn't be a problem though???
Should I try copying the original (and working) C drive to the new disk & try it again? I feel happier using acronis true image on my laptop to clone via usb than running acronis on the XP machine and having to mess around rebooting when it is complete. Using that method isn't causing the problem, I hope?