I still need very urgent help.
I already posted this problem without success and saw that this problem also occured at other installations.
I installed the NSP system one time and uninstalled it again.
Now I tried to reinstall it again and allways get the error FSL-01001 Unable to check existence of account localhost\SAP_LocalAdmin.
Any hints or ideas.
It is a local installation, all admin rights are available. Same environment like at the first installation, which was OK.
Also the change of the system name did not help.