slows down the computer. Lavasoft's Ad-Aware and Computer Associates' PestPatrol briefly de-listed WhenU as an adware target in February 2005. Why these two programs stopped detecting WhenU while continuing to target other similar adware programs has led to some speculation of their reasoning. WhenU was added back to Lavasoft's detection list a month later.

TRUSTe has included WhenU's advertising