De or het installatiepoging?

The correct Dutch article is:

de installatiepoging

Rule Words ending in -ing: almost always de. See the rule

How to use installatiepoging

the installatiepogingde installatiepoging
this installatiepogingdeze installatiepoging
that installatiepogingdie installatiepoging
our installatiepogingonze installatiepoging
your installatiepogingjouw installatiepoging
every installatiepogingelke installatiepoging
which installatiepoging?welke installatiepoging?
a big installatiepoging / the big installatiepogingeen grote installatiepoging, de grote installatiepoging