RE: "Error loading operating system" after reboot with Windows XP Pro

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Hi G.Just thought i,d put in my 2 cents.I noticed on the things you tried i
didn,t see system restore.You could try to restore to a date when it was
working.Hope this helps.TERRY.

"g61" wrote:

So here is my problem: Occasionally, after reboot I get "Error loading
operating system". After that the only thing I can do is shut down the
computer and fix the windows MBR/Boot Sector (see bellow…).

I'm running a clean install of Windows XP Pro SR3 on a Lenovo T61 laptop. I
have confirmed that in the majority of times the problem with the MBR/Boot
Sector happens during the windows session and not necessarily upon reboot.
When it happens there are no symptoms in windows except for when I try to run
chkdsk, I get the following error:

"The type of the filesystem is RAW.
CHKDSK is not available for RAW drives."

I've had my T61 for 6 months now and I've had this problem about 15 times so
far. Obviously this makes my T61 unstable and is becoming a major problem (I
like to shut down the computer before taking it anywhere, and I don't really
use Hibernate).

Solving this problem is very easy and takes 3 minutes… But the Win XP CD is
needed for the fix and I don't want to carry it around with me everywhere.
And anyway, it's annoying and makes my T61 crippled…

To fix the problem:
1 Change AHCI -> Compatibility in BIOS.
2 Boot using the Windows XP CD.
3 Enter the Recovery Console (press R).
4 "fixboot"
5 "fixmbr"
6 Restart ("exit").
7 Change back to AHCI in Bios.

After that the computer works perfect until the next time… Things I have
tried so far:
1 Installed latest Bios for T61.
2 Checked firmware for HD (WD Scorpio WD1600BEVS) and it's the latest.
3 Installed all windows updates for Windows XP and all Lenovo specific
updates.
4 Installed all latest drivers for T61.
5 Checked computer for Viruses, malware, etc. with 6 different scanners -
it's clean.
6 Updated some of the programs that I thought might be causing problems:
Avira , PerfectDisk 2008, TrueImage Home, etc. (I am not running any special
esoteric software, only big label popular stuff).
7 Checked HD with PC Doctor, WD's Data Lifeguard Diagnostic Tool and CHKDSK
- there are no problems.
8 Made sure EnableBigLba in the registry is enabled (although it should not
affect SATA drives anyway).
9 Disabled Lenovo's "Active Protection System" - the problem persists.
10 Checked MBR/Boot Sector with TestDisk analysis - there are no problems.

I am out of ideas. Something is corrupting the MBR/Boot Sector occasionally
during the windows session or upon shutdown. But I can't find why or under
what circumstances it happens… The only thing I didn't try was a completely
new clean system install, a thing which I REALLY don't want to do. Except for
this problem the system is great, very stable and I'm very happy with it.

Any ideas? Thanks in advance.
.

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