解凍 かいとうソフトではありませんでした
kaitōsofutodewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 解凍ソフト

1. Was not a thawing/unfreezing program.; Was not defrosting software.

Past/Perfective
Negative
Polite
Formal Register
Computing