version - Error: Registry key 'Software\JavaSoft\Java Runtime Environment'\CurrentVersion' -

i get

'error: registry key 'software\javasoft\java runtime environment'\currentversion'

has value '1.8', '1.7' required. error: not find java.dll error: not find java se runtime environment.'  

error after type java on command prompt.

i see answered in following link : 1. java error opening registry key 2. error: registry key 'software\javasoft\java runtime environment'\currentversion'?

but not have access c:/windows/system32 or 64...i not admin , contacting admin not option.

how can resolve it?

it worked when did following posted in above links posted in question.

1. in start menu type "regedit" open registry (be careful doing this)
2. go "hkey_local_machine" on left-hand side registry explorer/tree menu
3. click "software" within "hkey_local_machine" registries
4. click "javasoft" within "software" registries
5. click "java runtime environment" within "javasoft" list of registries
6. highlight "currentversion" (should see in main registry key explorer window on right)
7. change version "1.7"