Error Creating Registry Key when installing a Utility Program

I successfully installed Road Runner Medic, a utility program for the Road Runner Broadband Service, for one of two administrators on the computer, but I get the following error message when trying to install Medic for the second administrator:

Error Creating Registry Key

HKEY_LOCAL_MACHINE\Software\Support.com\TWC

RegCreateKeyEx failed; code 5

Access is denied

If I ignore the error and continue the installation, Medic is installed but is denied access to the Internet, which renders it useless. Can anyone help me understand this error message? Specifically, what is code 5? I have Windows XP Home Edition.

"Access denied" says it all.

The user you are installing the thing as has no privileges to create that key under HKLM\Software
You are an administrator, right?
You can check and change the permissions in registry with the regedt32 tool.

Thanks Nodsu for your help.

There are two people on the computer and both are administrators, so I do not understand why one of them is denied access.

I checked the Registry under that administrator's account with the account set as "administrator" and then set as "limited," and in both cases I could not open "support.com" and got the error notice: Error while opening key. There were other folders I could not open and received the same error notice. All the folders had the same thing in common: They were associated with programs which were not installed under that administrator's account, but were all installed under my administrator account. If I could install Medic in that administrator's account, I assume this would go away but, as I outlined in my initial post, I cannot get a clean install.

Therefore, if you are correct and, for whatever reason, Windows has denied access to that administrator, can you instruct me as to change that in the Registry? I do not know how to do that.

Again, thanks for your reply to my post.

wlknaack