any one having error 1721 while installing nokia software
updater!!
even if you install again Microsoft installer v3.1,it will not solve it.it is a corrupt repository.
For Windows XP Service Pack 2
the fix is very simple
Open command window: run
enter the following in the run command window:
rundll32 wbemupgd, UpgradeRepository
install noikia software updater
regards
sam