Yesterday, my windows vista auto update my pc for sp1, I then accepted and continue the process upon reboot/restart I got an error “acpi.sys is corrupt”, windows vista has a auto repair facility but it still doesnt work. I tried to check microsoft forums regarding this problem and I discovered that Im not the only one, there are lots of Vista SP1 issues, some got problem in NTOSKRNL, encountered blue screen and many more. There are some suggestions and they got it working but on my side i followed their suggestion and still ended up on error screen.

Heres my solution.
1. I Followed the suggestions in forum to replace some of my files in windows/system32
Try to search in Microsoft.com – “HP Pavillion Vista SP1 Problem”

2. After replacing those files.
   Remove battery/power and then place it back then power it on.
  
3. Press F8 and tried to boot in Last Known Configuration

4. System will reboot and start to install Windows Vista SP1 again.

5. Voila. My system is now online again.

But Im still  having little problem, the built in WIFI cannot detect any wifi signal on my place, so I installed my usb wifi just to test.

For now Its ok and running smoothly again, next step is to find the solution on how to enable my Wifi.