SoundTap might have installed along with other NCH software for evaluation purposes. This is secondary though...
If it causes system failure it is not secondary! You will find it difficult to resolve your problem if it keeps crashing.
Apart from the one dump files you are seeing unexpected shut downs. These could be hardware related.
See paragraph 2.14
http://www.gerryscomputertips.co.uk/syserrors4.htm
and paragraph 2.12 here:
http://www.gerryscomputertips.co.uk/syserrors3.htm
Overheating can also cause unexpected shut downs: