Write HKEY_LOCAL_MACHINE on Windows 7 without administrator privileges

First of all, I understand that this is a dirty situation, but this is not my design, and I'm just trying to help, and for this I need your help.

• Appendix A is automatically installed through the SMS installer under the administrator account, and not from the user account of the owner of the PC. Appendix A has a registry key defined in HKEY_LOCAL_MACHINEhive.
• After application A is installed, we want to edit the aforementioned registry key to assign the User folder C:\Users\USER_ID\Documents\(they tell me that we don’t know who the user has and does not have access to USER_ID in step 1).
• I know all about UAC, the application manifest and requestedExecutionLevel. However, I was told that we cannot expect all users to be in the Administrators group on their machine.
• The solution should be backward compatible with Windows XP.

I am looking for options to get `C: \ Users \ USER_ID \ Documents \ 'in the HKEY_LOCAL_MACHINE bush in the above conditions.

I found this thread, which could be related to a similar situation, but I still do not quite understand it (so I will give credit to anyone who will explain this better):

• Learn (read) the registered user in cmd is launched as another user

I also read something that excludes ClickOnce:

• Clickonce + HKEY_LOCAL_MACHINE