What is the Base URL during installation Magento on my local computer?

I am trying to setup Magento on my computer an all are ok by using wamp but

At the Configuration step one of error found that >>Please enter a valid URL. Protocol is required (http://, https:// or ftp://)

i have enter url or automatically located this >>http://localhost/test/mangentostor/

where all of magento file located at the location >>D:\wamp\www\ est\mangentostor (D: is primary drive for XP)

then which link should i use as Base URL ?:shifty:

You can use firebug to disable authentication on the form, this will allow you to use a localhost address.

When I remember correctly, Magento is picky with domains that don’t contain a dot, like “localhost”.
Easiest solution: add a hostname with a dot, e.g. “local.host” to your hosts-file (in D:/WINDOWS/system32/drivers/etc/hosts add “ local.host” without quotes) and your Apache config (e.g. as ServerAlias to your currently configured “localhost” vHost).