Ошибка 1625 sql server 2005

hi,i have a problem in installing sql server 2005 express,and even 2008.Ive searched the net for possible solutions but Ive not seen an error the same with me so ive decided to ask now. I hope someone can help me.

this is the error Ive received when i install sql server 2005 express:

sql server 2005 error

errors occured during the installation:
error 1625 installing microsoft sql server 2005 setup suport files.
see log file for more detailed information.
this installation is forbidden by system policy. contact your system administrator[/I]

<i will attach the log file below>

this is the error Ive received when i install sql server 2008 express:

[I]sql server 2008 error
TITLE: SQL Server Setup failure.
------------------------------

SQL Server Setup has encountered the following error:

MsiGetProductInfo failed to retrieve ProductVersion for package with Product Code = '{4A6F34E2-09E5-4616-B227-4A26A488A6F9}'. Error code: 

1608..[/I]

------------------------------

I’ll provide as much information as possible.here it is-
Im using windows xp(p4,2.8GHz,512 RAM)
Im the administrator
before,ive installed a sql server 2005 with advance features,the installation is successful but there are no instance installed so i reinstalled the program.But while im in that 2nd installation,my computer restarts and it continually restarts again and again. Ive log in safe mode,enabled the windows installer,and uninstalled the sql server and all its components.after that my PC returned to normal<I think>.I think this is the reason why im getting error now.
I have a Visual studio 2008 professional installed in my PC.but even the sql server included in it fails to install.dont know why<but i can use the vspro correctly>

----this is the LOG file when the sql server 2005 express fails to install----
=== Verbose logging started: 8/6/2009  10:34:54  Build type: SHIP UNICODE 4.05.6001.00  Calling process: 

c:\fb302ef189df3ba066979fe5\setup.exe ===
MSI (c) (C0:98) [10:34:54:515]: Resetting cached policy values
MSI (c) (C0:98) [10:34:54:515]: Machine policy value 'Debug' is 0
MSI (c) (C0:98) [10:34:54:515]: ******* RunEngine:
           ******* Product: c:\fb302ef189df3ba066979fe5\Setup\SqlSupport.msi
           ******* Action: 
           ******* CommandLine: **********
MSI (c) (C0:98) [10:34:54:531]: Client-side and UI is none or basic: Running entire install on the server.
MSI (c) (C0:98) [10:34:54:531]: Grabbed execution mutex.
MSI (c) (C0:98) [10:34:55:781]: Cloaking enabled.
MSI (c) (C0:98) [10:34:55:781]: Attempting to enable all disabled privileges before calling Install on Server
MSI (c) (C0:98) [10:34:55:812]: Incrementing counter to disable shutdown. Counter after increment: 0
MSI (s) (CC:04) [10:34:55:859]: Running installation inside multi-package transaction c:\fb302ef189df3ba066979fe5\Setup\SqlSupport.msi
MSI (s) (CC:04) [10:34:55:859]: Grabbed execution mutex.
MSI (s) (CC:C4) [10:34:55:875]: Resetting cached policy values
MSI (s) (CC:C4) [10:34:55:875]: Machine policy value 'Debug' is 0
MSI (s) (CC:C4) [10:34:55:875]: ******* RunEngine:
           ******* Product: c:\fb302ef189df3ba066979fe5\Setup\SqlSupport.msi
           ******* Action: 
           ******* CommandLine: **********
MSI (s) (CC:C4) [10:34:55:875]: Machine policy value 'DisableUserInstalls' is 0
MSI (s) (CC:C4) [10:34:57:218]: File will have security applied from OpCode.
MSI (s) (CC:C4) [10:34:57:718]: SOFTWARE RESTRICTION POLICY: Verifying package --> 'c:\fb302ef189df3ba066979fe5\Setup\SqlSupport.msi' against 

software restriction policy
MSI (s) (CC:C4) [10:34:57:718]: SOFTWARE RESTRICTION POLICY: c:\fb302ef189df3ba066979fe5\Setup\SqlSupport.msi has a digital signature
MSI (s) (CC:C4) [10:34:59:390]: SOFTWARE RESTRICTION POLICY: c:\fb302ef189df3ba066979fe5\Setup\SqlSupport.msi is permitted to run at the 

'unrestricted' authorization level.
MSI (s) (CC:C4) [10:34:59:500]: End dialog not enabled
MSI (s) (CC:C4) [10:34:59:531]: Original package ==> c:\fb302ef189df3ba066979fe5\Setup\SqlSupport.msi
MSI (s) (CC:C4) [10:34:59:531]: Package we're running from ==> c:\WINDOWS\Installer\baf36.msi
MSI (s) (CC:C4) [10:34:59:750]: APPCOMPAT: looking for appcompat database entry with ProductCode '{53F5C3EE-05ED-4830-994B-50B2F0D50FCE}'.
MSI (s) (CC:C4) [10:34:59:765]: APPCOMPAT: no matching ProductCode found in database.
MSI (s) (CC:C4) [10:34:59:921]: MSCOREE not loaded loading copy from system32
MSI (s) (CC:C4) [10:35:00:781]: Machine policy value 'DisablePatch' is 0
MSI (s) (CC:C4) [10:35:00:781]: Machine policy value 'AllowLockdownPatch' is 0
MSI (s) (CC:C4) [10:35:00:781]: Machine policy value 'DisableLUAPatching' is 0
MSI (s) (CC:C4) [10:35:00:781]: Machine policy value 'DisableFlyWeightPatching' is 0
MSI (s) (CC:C4) [10:35:00:890]: APPCOMPAT: looking for appcompat database entry with ProductCode '{53F5C3EE-05ED-4830-994B-50B2F0D50FCE}'.
MSI (s) (CC:C4) [10:35:00:890]: APPCOMPAT: no matching ProductCode found in database.
MSI (s) (CC:C4) [10:35:00:890]: Transforms are not secure.
MSI (s) (CC:C4) [10:35:00:890]: Note: 1: 2205 2:  3: Control 
MSI (s) (CC:C4) [10:35:00:890]: PROPERTY CHANGE: Adding MsiLogFileLocation property. Its value is 'c:\Program Files\Microsoft SQL 

Server\90\Setup Bootstrap\LOG\Files\SQLSetup0004_REK-820940929B8_Support.log'.
MSI (s) (CC:C4) [10:35:00:890]: Command Line: REINSTALLMODE=vomus REBOOT=ReallySuppress CURRENTDIRECTORY=c:\fb302ef189df3ba066979fe5 

CLIENTUILEVEL=3 CLIENTPROCESSID=4032 
MSI (s) (CC:C4) [10:35:00:890]: PROPERTY CHANGE: Adding PackageCode property. Its value is '{BEAAE9C2-09BB-435D-A1E1-D5856F406213}'.
MSI (s) (CC:C4) [10:35:00:890]: Product Code passed to Engine.Initialize:           ''
MSI (s) (CC:C4) [10:35:00:890]: Product Code from property table before transforms: '{53F5C3EE-05ED-4830-994B-50B2F0D50FCE}'
MSI (s) (CC:C4) [10:35:00:890]: Product Code from property table after transforms:  '{53F5C3EE-05ED-4830-994B-50B2F0D50FCE}'
MSI (s) (CC:C4) [10:35:00:890]: Product not registered: beginning first-time install
MSI (s) (CC:C4) [10:35:00:953]: Product {53F5C3EE-05ED-4830-994B-50B2F0D50FCE} is not managed.
MSI (s) (CC:C4) [10:35:00:953]: MSI_LUA: Credential prompt functionality not available on this operating system
MSI (s) (CC:C4) [10:35:00:953]: PROPERTY CHANGE: Adding ProductState property. Its value is '1'.
MSI (s) (CC:C4) [10:35:00:953]: Entering CMsiConfigurationManager::SetLastUsedSource.
MSI (s) (CC:C4) [10:35:00:953]: Note: 1: 2720 2: 2 
MSI (s) (CC:C4) [10:35:00:968]: MainEngineThread is returning 1625
MSI (s) (CC:04) [10:35:01:343]: No System Restore sequence number for this installation.
This installation is forbidden by system policy.  Contact your system administrator.
c:\fb302ef189df3ba066979fe5\Setup\SqlSupport.msi
MSI (s) (CC:04) [10:35:01:359]: User policy value 'DisableRollback' is 0
MSI (s) (CC:04) [10:35:01:359]: Machine policy value 'DisableRollback' is 0
MSI (s) (CC:04) [10:35:01:359]: Incrementing counter to disable shutdown. Counter after increment: 0
MSI (s) (CC:04) [10:35:01:359]: Note: 1: 1402 2: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\Rollback\Scripts 3: 2 
MSI (s) (CC:04) [10:35:01:359]: Note: 1: 1402 2: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\Rollback\Scripts 3: 2 
MSI (s) (CC:04) [10:35:01:359]: Note: 1: 1402 2: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\InProgress 3: 2 
MSI (s) (CC:04) [10:35:01:359]: Note: 1: 1402 2: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\InProgress 3: 2 
MSI (s) (CC:04) [10:35:01:359]: Decrementing counter to disable shutdown. If counter >= 0, shutdown will be denied.  Counter after decrement: 

-1
MSI (s) (CC:04) [10:35:01:359]: Restoring environment variables
MSI (c) (C0:98) [10:35:01:390]: Decrementing counter to disable shutdown. If counter >= 0, shutdown will be denied.  Counter after decrement: 

-1
MSI (c) (C0:98) [10:35:01:390]: MainEngineThread is returning 1625
=== Verbose logging stopped: 8/6/2009  10:35:01 ===

So thats it.i hope I explained my case clearly. If you have questions regarding my situation<and of course for answers>,please reply to this thread. I hope someone can help me. and thank you in advance.
sorry for my bad english.
thanks again and God bless!