Windows 7 broken: can no longer log in...

in recovery environment do
dir d:\
dir e:\
dir f:\

so you know what driveletters mean in recovery environment.
chkdsk/f c:
chkdsk/f d:
chkdsk/f e:
etc

any errors? files are still on disk?

in recovery environment->command prompt:
bcdedit /enum all >C:\mybcd.txt
then copy to some usb stick
COPY C:\mybcd.txt Q:\
if Q is drive letter of usb stick
now you ca delete mybcd.txt
DEL C:\mybcd.txt

put usb stick in another machine and post the file

Kaktussoft said:

sfc /scannow /offbootdir:c:\ /offwindir:c:\windows, as per one of your tutorials, but was told that it could not start the repair service,
o sfc /scannow, but I'm always told that a system repair is pending and that I must reboot and try again...

did you do the sfc/scannow command from "repair disk", "installation dvd", or by pressing F8 and enter "repair computer"? Don't do it using F8 as most of the time sfc/scannow doesn't work then. Sure your prompt was X: instead of C: when doing the command? Do a DIR C:\ in "recovery environment" to be very sure C: is indeed windows partition

dont use sfc /scannow as it scans the recovery environment itself!!
use the offbootdir options

-safe mode still gives you a BSOD?
-normal boot still works (but is behaving strange at logon screen)?
So the bcd store (bootmenu) is still there. I thought you renamed it (not smart as the system was booting)

TerDale said:

OK, so:
- rebooted with installation DVD
- open command prompt
- at X: prompt, dir c:, Windows partition right there
- sfc /scannow /offbootdir=c:\ /offwindir=c:\Windows
> Beginning system scan...
then, after 2 or 3 secs:
> Windows Resource Protection could not perform the requested operation
- sfc /scannow
> Beginning system scan...
then, after 2 or 3 secs:
told that a system repair is pending and that I must reboot and try again..
- so, rebooted with DVD again
- command prompt again
- sfc /scannow
> Beginning system scan...
then, after 2 or 3 secs:
told that a system repair is pending and that I must reboot and try again..

sfc /scannow doesn't work and it worked it checks the recovery environment itself!

so use: sfc /scannow /offbootdir=c:\ /offwindir=c:\Windows
as you did as well. I'll google for answers