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the steps taken and the error are mentioned please help, i am stuck here!
installed sql server 2005 express on both computers
installed sql server management studio express on both computers
ran each management studio and connect to instance sqlserver using windows authentication ( one computer connection example "A-63A9D4D7E7834\SQLEXPRESS" ) created a database in the databases named as "test1" created a few tables with data saved and exit.

did everything what this site says
"
How to configure SQL Server 2005 to allow remote connections"
[add h t t p here as spam prevention] ://support.microsoft.com/kb/914277/en-us"

but i have just disable the firewalls completely :turn off

connecting to A-63A9D4D7E7834
started "SQL Server Management Studio Express" on computer A-63A9D4D7E7834
sever name: "ALL-E425BE6C41D\SQLEXPRESS"
authentication: "windows authentication"
and CONNECT

I GET THE FOLLOWING ERROR

Cannot connect to ALL-E425BE6C41D\SQLEXPRESS.

ADDITIONAL INFORMATION:

Login failed for user 'ALL-E425BE6C41D\Guest'. (Microsoft SQL Server, Error: 18456)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=18456&LinkId=20476

BUTTONS:

OK

HELP