I just did a manual install of WordPress 2.6.1 & when I do a search
for my domain name in google the Lost Password page is showing
up with a box to put my email address in & have it sent to me.

How do I get the page to not to show up in google searches.

Block it in your robots.txt file. Add <meta name="robots" content="noindex"> to the page. Sign up for Google Webmaster Tools (it's free and has plenty of good info) One thing you can do once signed up is request to remove a URL from the index.

If Google has already indexed it it's going to stay indexed for a little while, but if you do the above it'll eventually come out of the index.

I say leave it. It's an indication that there isn't better content on your domain. Fix the actual problem, the lack of quality content, and the lost password page will be drowned out by the better stuff.

I would do like vangogh suggested and sign up for Google's webmaster tools. I had a few unwanted pages showing up in the SERPs and made a request to have them removed.. only took a day or so.

lost pw page showing up due to a new install as there is no content on the site. if you build your blog, it will be automatically taken care of. just make one or 2 post and then submit them to few popular social bookmarks