Read the thread I pointed out...
The one and only solution (this is found all over the web, if you know what to look for):
quote:
Originaly posted by Liam
Hi,
I've finally figured out how to remove Yahoo! Internet Mail. The error is that regsvr32 cannot use the ymmapi.dll file correctly. It cannot install (the /i switch) or uninstall (the /u) switch. All the Yahoo uninstall program does is have regsvr32 execute the uninstall command silently, which is why the screen only flashes. You will see the error message if you do not use the silent flag.
The solution is to log into Yahoo mail (or get an account) and click on the compose button. Then, click on the "Enable Autocomplete" link or image. Follow the steps to install Autocomplete (but be careful to not choose to set it as your default mail client, etc.). Once it has installed you may now return to the Add/Remove programs dialog and uninstall Yahoo! Internet Mail as before, and then uninstall Autocomplete. It worked for me, I hope it is of some help to others. This is a relatively simple and low-risk solution as it does not require manually editing the registry.
And if you read carefully the official instructions (also in my previous post), they say the same (pretty vague though)...
/ 
