Computer not rebooting after Volatile Environment HKEY deletion?

Summary: I was attempting to remove a persistent game title from my cluttered Programs list

so I entered regedit (register edit) and tried to find it (failed) and in the process I deleted a few other persistant already deleted games under "Uninstall" registry , but then I made clownish mistake of pressing another register folder list and deleted something called "Volatile Environment"  under HKEY/Current User and then I couldn't access the Control Panel's Add/Remove Programs list anymore (it wouldn't respond to my clicks), and when I restarted the PC,

I failed to enter the regular restart and was stuck forever at the start up screen, also the usual Login greeting words didn't pop up, and only some mojibake flashed on the screen for a second before leaving me eternally stuck at the loading screen , so I'm guessing the deleted file was something important.  additionally, I can still acess the BIOS Setup Utility.I've got the tool doing a HDD Diagnostic test but its taking some time.

So... help plz? :o

I'm typing this on a spare, slower Win7 computer btw


Question Info

Last updated March 24, 2018 Views 262 Applies to:

I didn't have a previously saved state for System Restore so it could not be used,  any other options?

Things are getting progressively harder . . .

You can restore your registry files manually to an earlier point by going through the steps outlined below. The process is involved and requires some careful typing. Ask a computer-savvy friend to assist you if you lack experience in this area. Note that it might reset your password to an earlier value.
1. Keep tapping F8 during the early boot phase.
2. Select Repair from the menu.
3. Log on as Administrator if prompted.
4. Select Repair when prompted.
5. Select the Command Prompt from the menu.
6. Identify the correct drive letter for your Windows installation. It could be a drive other than C: but it won't be X:. You do it by typing the commands
    dir C:\Win*
    dir D:\Win*
    dir E:\Win*
    until you find the Windows folder.
    I shall call that drive "Q:".
7. Type these commands:
    cd  /d  Q:\windows\System32\config
    xcopy  *.*  Q:\MyRegBack\
    cd  RegBack
8. Examine the dates of the Software, System and SAM files. Were the files created before or after your problem became apparent?
9. If they were made before the problem became apparent then you can type these commands:
    copy /y software  ..
    copy /y System  ..
    copy /y Sam ..
    (the two dots are part of each command)
10. Reboot normally. If things do not work out then you can backtrack by copying the original registry files from Q:\MyRegBack to Q:\Windows\System32\config.

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