Obtained from your local mission agency, this mission involves having a hostile virus uploaded to YOUR nano deck. This is going to cause a constant damage over time program to run in your NCU that hits for 200 points continuously. Due to this you want to get to your location ASAP!
Depending on how far you have to travel and what your health is at, you may want to get a heal over time (HoT) nano cast on you or you could be stopping a lot to keep yourself alive. If at any time you feel you can't complete the mission, deleting the Agency NCU Analyzer from your inventory will remove the hostile nano and cause the mission to fail, giving you your 18 hour lockout before you can take another.
You can get to the location any way you want, either by traveling from the 4 Holes grid or exiting 5-L from the fixer grid. You'll find Virologist Niskala by the windmills in the southwest section of the zone.
At this point you simply give to him the Agency NCU Analyzer from your inventory.