here's the instructions on how to solve ur problem with registry and task manager
Registry Editor
1. click start
2. click run command
3. type cmd
4. and then type this command in command prompt
note: (dapat gayahin kung ano man nakalagay)
REG add HKCU\Software\Microsoft\Windows\CurrentVersion\
Policies\System /v DisableRegistryTools /t REG_DWORD /d 0 /f
Group Policy (gpedit)
Start -> Run -> gpedit.msc -> User Configuration ->
Administrative Templates -> System ->
Prevent access to registry editing tools ->
Right Click Properties -> Disabled