"Uninvited" is driven by four piano notes and builds to an instrumental climax, and haunting atmosphere accompanied by cryptic lyrics.

Because the song was not released as a physical single in the United States, it was not allowed to chart on the Billboard Hot 100 due to rules in place at the time.

According to a publicity manager for Warner Music Canada, the measure was "an inconvenience" taken to stop radio stations from playing low-quality versions of the song downloaded from the internet.

Newsbytes, a computer industry news service, reported that fast-working fans in Los Angeles, upon hearing the song on KROQ, taped the track and uploaded it onto their websites.

[11] Although never officially released as a single to retail outlets (which prevented it from charting on the Billboard Hot 100), the song became a hit for Morissette.

English band Freemasons recorded a version of "Uninvited" featuring British singer and songwriter Bailey Tzuke for their 2007 album, Unmixed.

The single experienced the most commercial success in the Flanders region of Belgium, reaching number two on the Ultratop 50 in February 2008.