Right - I spent a couple of hours on this problem, this afternoon (and not a choccy biccy to be had).
First, as MAT ALAN suggested, I ended msimn.exe on the Processes tab of the Task Manager. The OE error report then disappeared. But when I tried to launch OE again, it's splash screen came up and just hung. There was no further error report of "another instance already running" but OE just wouldn't get past the splash screen.
So I switched off and unplugged from the mains for 10 minutes. After restarting, no change.
After that, here's what I tried:-
1. I deleted all spam emails from my neighbour's Tiscali mailbox, via webmail. 2. I ran System Restore to roll the computer back to a date before the problem arose. This ran successfully but did not resolve the problem 3. I also ran System Restore in Safe Mode. Ditto result. 4. I deleted all temporary internet files from Internet Explorer (this may appear to be irrelevant, but I believe Outlook Express does, in fact, make use of the same folder) 5. I re-registered Outlook Express (Run> msimn /reg) 6. I re-registered the libraries (Run> regsvr32 xxxxxxx.dll) This had the following results:-
urlmon.dll - successful mshtml.dll - error report "mshtml.dll was loaded but the DllRegisterServer entry point was not found. The file can not be registered". shdocvw.dll - successful browseui.dll - successful msjava.dll - error report "LoadLibrary ('msjava.dll') failed. The specified module could not be found".
7. I ran a scan with the System File Checker, which asked for the Windows system disk many times. I was unable to insert this in order to complete the process, because she hasn't got an XP recovery disk.
After every stage of this process, trying to launch OE had the same effect - it hung at the splash screen.
So I gave up. :o(
Does anyone have any suggestions for resolving this problem, please, bearing in mind that there's no XP disk available?