Win 7 boots with user selection, but no login screen. Help?

Hello, I just installed windows 7 updates.

My Fugitsu Laptop boots to the user selection screen, but when I select admin or user account there is a pause of several seconds before the screen goes black and I am returned to the user selection screen. The same problem occurs when I attempt to start the computer in safe mode.

I considered doing a system restore through safe mode with command prompt, but cannot log in to my admin account, which is a required step in all the instructions I have looked at. I have no install disks. I would prefer to preserve files, but they are not essential. Any advice would be very welcome.
Thank you for your time

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Clarification Request
can you get into Admin

account by leaving password blank? Tried it in Safe Mode?

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There is no password entry field

to leave blank in the first place, in normal or safe mode. I am essentially stuck on user selection screen. I shall try R. Proffitt's suggestion of troubleshooting for corrupt user profiles and will reply with results.
Thank you

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That has many priors.

Google "Windows 7 Corrupt Profile" and well, that's why we must have spare admin accounts.

Try safe mode boots too.

As to preserve files, we've had years of ways to save files such as replacing the drive and using this blown OS drive as an external and more.

As to your restore media, you can order it if you forgot to make them.

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Fixed problem by doing a system restore

My actions were as follows:
1. remove all devices connected to computer. (likely not relevant)
2. mash f8 on startup, which brought up a working admin login screen that had not worked before.
3. did a system restore to before the critical microsoft security updates installed earlier today.
4. restarted computer in normal mode and logged in successfully.
5. hugged my dog in celebration

Thank you for your help, everyone. This forum is lovely.

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If you can't get into Windows, U can boot Linux & save data.

Get hold of a Linux DVD or flash drive & boot from it. In 2-3 min. you'll be up and running, and can copy your data to an external device.
Good luck.

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