When I do search for linux-image in Synaptic I get the following installed

2.6.35.22.35 - generic
2.6.35.24.42 - generic
2.6.35.24.28 - generic

When I go to System>Ubuntu_About I get

You are using Ubuntu 11.04 – the Natty Narwhal

I never intentionally installed or upgraded to 2011. Any ideas on how that
happened?

Odd that your installed kernels are all for 10.10, but the release is
said to be 11.04 - possibly an aborted upgrade?

One thing is for sure: the system won't upgrade to a new version unless
directed to, so either you inadvertently started an upgrade, or someone
with access to your system is playing tricks on you.

There is a checkbox in the system update GUI that, if checked, will
upgrade the OS to the next version, but it's disabled by default.

I have gone into Synaptic Package Manager and searched for linux-image,
found several and only kept the last three, removing the rest. The ones kept
are the same as those listed below. I then did a restart, I am dual boot
and
grub came up showing the ones below plus the memory test and the Vista
windows also. I wanted to go back into Ubuntu, it was selected so I hit
enter.
Now here is the strange part. I a little later did another restart. The
grub list
came up, only this time again showing the complete list of 3.6.35.21 through
3.6.35.26 whatever but I think you know what I am getting at, but they are
still showing in Synaptic as being removed.
Is there a way to generate a new grub list for dual booting?

You go into the files system and click to open the Grub folder, then the
Menu List. This will open in the gedit program so you can edit it. It
tells you what to do but do not delete anything with a # at the start.

Did an update to 10.04 last night requiring a restart, had a new kernal
installed, after the reboot the list shown at boot was down to what I
expected.
More study into the scripts for this grub version 1.98 is in order for me.

Did you remove the header files as well?

Well not sure, I still have everything I could find in /boot/grub
relating to each numbered kernel. Where and what is the headers?

Headers interface between the kernel and the libraries, user space and
applications. You remove kernel headers using apt-get or Synaptic rather
than a file manager. You need to keep things tidy or you risk messing up
your system. Just search (not quick search) in Synaptic for headers and you
will see which ones are installed. Utilities like Ubuntu Tweak or Ailurus
will also allow you to clean up your old kernels.

It in Update Manager where you click the Settings Button and the Updates
tab. You probably have it set to upgrade automatically in the background