nagging error 1721 with new install of game

I unistalled a game a month ago(Borderlands) now i can install the game but not the downloadable content, mainly 4 add-ons. First i got rid of error 1311 and now error 1721 is the problem. At the time i said ok, i got another hard drive on the way, did a fresh install of windows 7 pro(legal OEM disk) with all the updates, thinking it would solve my problem but no. Did the re-register of win installer in cmd, tried to find another more recent version of win installer to no avail, put win installer automatic in services.msc. No support is offered to that specific error on borderlands web site....i'm stumped. What's next?

• › Upgrade Video card for New World of Warcraft
• › COD 4 Install Issues
• › rise of nations installation problem in vista
• › call of duty 4 does not have install option
• › will a new processor work with my old motherb
• › Direct X error
• › I have a problem with version of shader 1.4