SID changed and now i cannot start my laptop at all

HI every one am a new member and i really neeeed ur help
irecently bought an Asus A53S
core i5
grafix card 1 giga nvidia
640 HDD
6 giga Ram
a using windows 7 64 bit ,, the laptop was working perfectly but i downloaded windows blind 7,2 and it started to change the SID and after the SID changing process done the laptop Restarted but ddnt start and gave me a blue screen of death
stop:0x0000000(0,00000 F4)
smething like that
i cannot start my Windows at all. Please help!!

Can u tell me how to fix this? - i tried using 'System Recovery Options' and :

1- Startup Repair, doesn't work (it isnt able to find & repair)

2- System Restore, wont let me restore it at any restore points.

3- System image recovery , doesn't work.

4- Windows Memory Diagnosis, doesn't resolve anything.

help me plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

i did the steps in this link because i thought its a similair problem :

Startup Repair Infinite Loop Recovery

and i messed it up because it told me in step 17 : If any one of them are 0 bytes, then you should stop what you're doing now and seek an alternative method of recovering your system, because Windows cannot function with a 0-byte size registry hive.

and i ddnt read that and now the only option appear in Recovery Options screen is the startup repair only
plzzzzzzzzzz helppp i ddnt enjoy my labtop at all not even for an hour

If you cannot boot the system into Normal Windows, Safemode or run system repair, your only option is to reinstall Windows 7.

Try pressing F9 key during boot-up to bring up the HDD Recovery Partition.

If no-go, check owner's manual - select "download", "Windows 7 x64", "manual" -

http://support.asus.com/Search.aspx?...53S&ps=10&pn=1

If system recovery does not work, you'll need to order replacement Windows 7 recovery discs from Asus -

http://support.asus.com/ServiceHome.aspx?SLanguage=en

Regards. . .

jcgriff2

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