DRM vulnerability to spyware in Win98

After downloading a wmv file on a page of unidentified links, I got a request:
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Security Upgrade Required
The owner of the protected content you are trying to access requires you to first upgrade some of the Microsoft digital rights management (DRM) components on your computer.

Click OK to upgrade your DRM components.

Details
When you click OK, a unique identifier and a DRM security file are sent to a Microsoft service on the Internet. The file is replaced with a customized version that contains your unique identifier.

This increases the level of protection provided by DRM.
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Searching for spyware abuse connected with DRM, I found this:
“After attempting to download the DRM, Edelman said: "On a fresh test computer, I pressed Yes once to allow the installation. My computer quickly became contaminated with the most spyware programs I have ever received in a single sitting. "
"All told, the infection added 58 folders, 786 files and an incredible 11,915 registry entries to my test computer. Not one of these programs had showed me any license agreement, nor had I consented to their installation on my computer," he added.â€

So in view of that, how do I proceed safely?

 

Upgrade it at the legit link below.
http://drmlicense.one.microsoft.com/Indivsite/en/indivit.asp