For Windows 95, OSR2, OSR2.1, OSR2.5:

Date: 6/23/98
Time: 2:44pm
Version: 4.00.950 18,570
Size File name: Vtdapi.vxd

For Windows 98:

Date: 6/22/98
Time: 3:48pm
Version: 4.10.2012 18,944
Size File name: Vtdapi.vxd

http://support.microsoft.com/support/kb/articles/q216/6/41.asp