Cannot delete an item in my inbox,

Message says " an unknown error has occurred.
Please advise on how to correct this problem. Am using a new Dell computer
with the Windows Vista, Home Edition"
Thanks

The best thing to do is ignore them.

If you are not willing to just ignore them, the only way is to delete both
copies of the database (which does not contain the messages, but only
references to them) and let WinMail rebuild it.
First close WinMail, then use Task Manager to make sure there are no
instances of it under applications or processes.
Then click Start | Search | Advanced Search
Check the box to include non-indexed, hidden and system files.
In the Name field type WindowsMail.MSMessageStore and click the Search
button.
It should show you two copies. Delete both of them and re-open WinMail.
WinMail will work in the background and recover all of the messages that are
really there.

Although some people have said they lost all messages doing this, WinMail
should recover them in the Recovered Messages folders.

Sending the same message more than once seldom gets you help any faster.

Unknown error and undeletable files in Windows Mail are usually due to
interference from an antivirus program, antispyware program, or antispam
program. What if any such programs do you have?

For a temporary fix, download and install this hotfix, with Windows Mail
not running:

http://support.microsoft.com/default.aspx/kb/941090

Although it's labelled as for mail stuck in the Outbox, it also works in
other folders. If you don't know whether you have a 32-bit version
of Vista or a 64-bit version, try the hotfix for the 32-bit version first.
The Vista SP1 update includes this hotfix and more, but takes longer
to install

This will help show you how to fix the stuck undeletable email message
problem in Windows Mail for all folders.

The KB941090 update will just fix the problem for now. You must stop
the cause to prevent it from happening again. Read the "First" section
in this tutorial about antivirus programs to help prevent this from
happening again, then install the KB941090 Microsoft Update in the
"Second" section to fix the stuck message problem.

move all your messages to another folder. locate your inbox file and delete
it. That should do it

Try deleting the e-mail above and the one below whatever it is you are trying
to get rid of

One can just disable the preview pane (View | Layout) and then highlight and
delete.

I drug the offending e-mail to the trash folder and emptied the trash and it
worked!

I have the same problem. I have a new Compac computer with Windows Vista,
Home Edition. Have you had a response on how to correct the problem.