msgid "Run %1 only on computers that you own, or for which you have obtained the owner's permission. Some companies and schools have policies that prohibit using their computers for projects such as %1."
msgstr "Installieren Sie $1 ausschliesslich auf Computern, die Sie besitzen, oder von denen Ihnen die Zugriffserlaubnis des Besitzers vorliegt. Die Regeln mancher Firmen und Schulen verbieten die Nutzung ihrer Computer für Projekte wie $1."

The two occurances of "$1" should be "%1"

There I thought that Computern were in German called Rechner, in single and plural. Computer ist gestatttet ohne 'n' wie Rechner. Maybe garblefish converted the % to $ ;>)

funny, found the use of Computern in a wiki.... is this Hoch Deutsch?

Nah, computer is a German word :-D, see the Duden:
Com|pu|ter [...'pju:...], der; -s, - <engl.> (programmgesteuerte, elektron. Rechenanlage; Rechner)

The appended 'n' denotes dative plural, same as with "Rechner".
"auf Computern" = "auf Rechnern"

Gruß,
Gundolf

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Computer sind nicht alles im Leben. (Kleiner Scherz)

There you go, "die Rechnern" is seemingly legal.

would be "auf [den] Rechnern" / "auf [den] Computern" in this case

They tried to make "Computer" look more like a German word - but nor too many wanted to write "Komputer" ;-)

"de:Rechner" is "en:calculator", basically a "de:Computer" is a "de:Rechner" as well, but Abacus (or Abakus) and pocket calculator are Rechner as well, so the word "Computer" is more specific.
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Finns have quite an interesting way to mix their grammar into foreign words btw., they separate the ending, that is required by their language, from the original word with a colon (or join ending to foreign words with a colon, depending on your point of view)