Thank you to all for your suggestions. I was totally despairing. 1. I've manually deleted everything relating to wnsoft and p2e. 2. I've manually edited the registry to remove refernces to the same. 3. Disconnected from the router. 4. Rebooted. 5. Switched off virtually everything except Explorer (!) 6. I've defragged the D:\ partition. 7. Rebooted. 8. Checked again for any more wnsoft & P2E references - found & deleted 3 more! 9. Unzipped yet again the 4.40 zip file. 10. Ran setup - this time for the C:\drive - and it worked! I still don't think the uninstall is a workable thing - it may do for XP, but it didn't for 98SE. It SAID it had uninstalled, but that was not true - it left nearly the whole programme, folder, icon, etc, in-situ. I suspect it may not be able to cope with a programme installation that is NOT in the C:\ drive, but in a multi-partitioned drive. I cannot rely on the UOB Computing Service for much now, as I have been retired for some years now. I DID have some trouble a while back with not being able to defrag the D:\partition - all the others defragged OK, but scandisk did report a problem. The CS suggested what I'd already decided to do - copy the D:\ onto a couple of CDs, wipe the partition clean, reformat it, and reload the software, and it worked perfectly, as did the defrag just now. This Maxtor hard drive is only about 3 years old, and I think most problems come from Windows itself, not coping with too many applications being run one after another. It just doesn't release memory etc, and so runs out of resources, then starts to fall over. Is anyone going to write Pix2Exe for linux - PLEASE? I sick of Microshaft......