You need check next things:
1. Set in registry param HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\WOW to yes if it set to no.
2. Go to TEMP folder and delete all entries which possible.
3. Open Task Manager and kill all not necessary processes. Leave only system processes.
3 item is most important. Some application can use some resources and prevent work setup.exe normally.
As far as I know problems can be if run some of Nero Scout processes (NMBgMonitor). But not only its. In my case it be something other.
Others solutions from internet:
1:
I had this exact problem and searched high and low. After playing with
Process Explorer from Microsoft I found a print screen utility was
keeping my Setup.exe from running. After killing it everything worked
great. Not sure of the true root cause however. Here is the program
that was causing the hang-up.
http://software.techrepublic.com.com/abstract.aspx?docid=740263
2:
The solution on my system was to disable zonealarm, i think it blocked
some processes because it was corrupted.
3:
And now I have solved it:
- I turned off Norton Antivirus.