Hi,

it is NOT a virus, but a vulnerability.

Description:
A vulnerability has been reported in Microsoft PowerPoint, which can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to an unknown error when parsing certain strings in a specially crafted document.

Successful exploitation allows execution of arbitrary code.

NOTE: The vulnerability is currently being exploited in the wild.

Solution:
Do not open untrusted documents.


http://secunia.com/advisories/21040/

HTH