I'm on the verge

I'm running XP Pro with a SATA RAID Stripe. About a month
and a half ago, after a year of flawless use, I recevd a
CHKDSK on bootup. Was a bit nervous but didn't think much
of it.

I don't know if its related but have done EVERY update
WinXP has asked for and on May 12th after doing a Sec
Update and downloading the Baseline Security Profiler,
before the XP splash, I recvd a message saying
my "pci.sys" was missing from "system32\drivers" or it was
corrupted. It recommended an XP recovery Console session.

I tried this and it copied over the files it needed and
now when I boot, I get the splash and then I receieve an
error: (I wrote it down verbatim, but goes something
like)

STOP. {Fatal System Error} Session Manager
Initialization process terminated unexpetedly. The system
was shut down.

I have a copy of ERD Commmander 2003 and have done three
restores to different dates but to no avail. Unless I
boot to ERD, my machine is stuck in an endless loop of
boot and crash.

ERD is saying it can't find the network adapter,
otherwise, I'd shuffle my files off to my laptop and start
from scratch.

Apologize for the long winded explanation but wanted to do
my due diligence before asking for anyone's help.
Anything would be appreciated. Thanks very much,

Dave