Windows 7 Trusted Installer

[Boss]

Hi,

I'm trying to delete a folder, but it shows the message "TrustedInstaller permission required". When I go to Properties->Security, I can't change the permissions for TrustedInstaller (disabled).
What do I do?
I have several folders like this, and I need to liberate space on C:

Thx,

Boss

 

[Neemobeer]

What folder are you trying to delete, typically folders with locked ACLs should not be deleted.

 

[Boss]

I'm trying to delete folder <DVD Maker>. I don't need it.
I have 0 space on C:

 

[Boss]

Fixed it.
Please see my other thread about RealPlayer Cloud.