The Sql Server Failed To Start

hi there

My object is a database on a single machine to start with . i am running xp home

i am a complete newbie to this, so please bear with me.

i have vb 2005 express edition running on my machine. i then downloaded sqlexpress_adv adition and tried to install.

It checks the prerequisites "the required components were installed successfully"

goes to sql server install wizard , checks the sytem configuration , 15 success , 1

failure.

message = iis feature requirement warning. it says install via control panel / add /remove etc . ???????? it is not in the list of programs.

can i still carry on with the installation?. ( i did)

It gets to feature selection.The database services is marked. (hit next)

Instance name comes up . Default is ticked named instance "sqlexpress". (hit next)

It then says existing compomponents have been found. Select upgarde options below. I ticked sql server database services 9.00.1399.06. (details gives allowed upgrade)

(hit next)

windows authentication mode checked (hit next)

validating settings

then msbox != "the sql server failed to start, see books on line and log etc"

i goto the log

2007-03-08 11:08:54.62 spid5s Starting up database 'master'.
2007-03-08 11:08:54.73 spid5s WARNING: did not see LOP_CKPT_END.
2007-03-08 11:08:54.73 spid5s Error: 3414, Severity: 21, State: 2.
2007-03-08 11:08:54.73 spid5s An error occurred during recovery, preventing the database 'master' (database ID 1) from restarting. Diagnose the recovery errors and fix them, or restore from a known good backup. If errors are not corrected or expected, contact Technical Support.
2007-03-08 11:08:54.73 spid5s Cannot recover the master database. SQL Server is unable to run. Restore master from a full backup, repair it, or rebuild it. For more information about how to rebuild the master database, see SQL Server Books Online.



any help would be appreciated.

thanks

argoosy12