it still failed....but i got a step closer (i think) now it shows a different error message "The publisher of the data "C:\windows\temp\VSD5ba.tmp\dotnetfx\dotnetfx.exe cannot be verified." i looked through the files and found out that "C:\windows\temp\VSD5ba.tmp\dotnetfx\dotnetfx.exe" does not exist. there isnt any dotnetfx.exe, instead there is dotnetchk.exe. any more ideas? tq