I cannot install my Trados license 2015.

I had this issue PATH to TEMP folder]\DotNetFx452\NDP452-KB2901954-Web.exe has changed since it was initially published.

So I followed this procedure:

1. Cancel the SDL Trados Studio installation.
2. Download the Offline Installer from here: Microsoft .NET Framework 4.5.2 (Offline Installer).
3. Install Microsoft .NET Framework using the offline installer.
4. Install SDL Trados Studio or SDl MultiTerm.

But it says I already had a NET Framework installed, but I don't have it anywhere in my computer, apps..

So I followed this procedure:

1. Open the Run dialog (press [Windows key + R]) and type: cmd.
2. Disable Windows Update, type in the Command dialog: net stop WuAuServ.
3. Go to: C:\Windows.
4. Locate the folder SoftwareDistribution and rename the folder. For example: SoftwareDistribution_OLD.

But it says I cannot rename it because it is open somewhere.