HP/Veritas/Sonic DLA – TFSWSHX.DLL
Tfswshx.dll is the browser helper object that installs with Hewlett Packard's Veritas software that comes on many HP or Compaq systems equipped with a CDRW or DVD burner. It also installs with the Sonic CD/DVD burning software. This is needed for Drive Letter Access (DLA) functions. DLA lets you format a CD or DVD and then use it as if it was another hard drive. This is similar to Adaptec's/Roxio's DirectCD.
For more information including instructions to enable or disable DLA, visit http://www.sonic.com/products/dla/default.asp.