Leading the list at #1 : AOL
Ending the list at #25 : Sharp R3D3 notebook (2004)

A few honorable metions :
2.  Real Player.
15.  Iomega Zip Drives.  When the drive died, it took the data with it.

http://news.yahoo.com/s/pcworld/125772;_ylt=AgBaLpkLqy6JZ8IeykkbhBMjtBAF;_ylu=
X3oDMTA5aHJvMDdwBHNlYwN5bmNhdA–