Registry is corrupt:
Repair action: Registry roll back
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.
1. Keep tapping F8 during the early boot phase.
2. Select Safe Mode Command Prompt from the menu.
3. Log on as Administrator if prompted.
4. Select Repair when prompted.
5. Select the Command Prompt.
6. Identify the correct drive letter for your Windows installation. It could be drive E: or F:. You do it by typing the commands
until you find the Windows folder.
I will call that drive "Q:".
7. Type these commands:
cd /d Q:\windows\System32\config
xcopy *.* Q:\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:\Regback to Q:\Windows\System32\config.
run sfc/scannow and or do a Repair Install
repair corrupted registry keys
kaspersky.com/faq/?qid=208279463 ? It may found and delete that remnant key.
Also have you tried deleting it from an elevated commandline?
Delete stubborn impossible registry key! Solution / Fix « Countdown to critical mass
If all else fails, use this tool, very powerful, must exercise caution.
IntroductionUtilities like Telnet and remote control programs like Symantec's PC Anywhere let you execute programs on remote systems, but they can be a pain to set up and require that you install client software on the remote systems that you wish to access. PsExec is a light-weight telnet-replacement that lets you execute processes on other systems, complete with full interactivity for console applications, without having to manually install client software. PsExec's most powerful uses include launching interactive command-prompts on remote systems and remote-enabling tools like IpConfig that otherwise do not have the ability to show information about remote systems.