How long do HPF2's normally run on your computer? If you tell us 24 hours, this one will do so too. Maybe your computer was off or something else that made BOINC inflate the computing time [wallclock] such as a temporarily stuck work unit. At any rate, just let it run.

Why it is 96 hours deadline is because your computer has recently been returning results within 48 hours [a very good sign]. Than it's thought capable to also run so-called repair units, Wu's that by a previous assignment to another cruncher did not get completed in time or ended in error. These repair unit require a quicker return than the first time [originally] assigned work units

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Note estimates can be incredibly wrong. Seen thirty hour estimates be completed in four hours.

Sometimes the estimates are just wonky. Have one run and see if it really takes that long.