Depending on which computer your ip address may be different.
To find your ip address, press windows-r for run, and type cmd and press 
enter.  Now you are at the command prompt.
Since you don't have a screen reader, type the following and press enter.
Type this with out the quotes.
"ipconfig > c:\ipconfig.txt"
press enter.
Now you have a copy in text of all of the information that ipconfig found 
out.
In particular, the bottom line of the file, which says
"gateway . . . and at the end of lots of dots, is the ip address.
Then you can type it from the run line adding http:// in front of the 
address.
Howard is right, usually its admin and password.
This will tell you the ip address, of your computer and the ip address of 
your router.