Windows 7: Netbeans 6.8 taking too much time to start on windows 7

Netbeans 6.8 , 6.5 , zip distro ..all are taking too much time(around 40 minutes) to start on windows 7
whereas it is working well in windows xp(within 10 minutes) . My jdk is version 6 update 20 , so no compatibility problem

Also , theres no problem , with netbeans.exe file because , the log files it generates are fine during start up .
There has to be some reason related to the platform
Could anyone suggest , the reason and the solution .



Thanks in anticipation!!

Apparently there are a few fixes:

Thanks for the reply,
Please , mention , do i have to do this , after uninstalling netbeans or after i reinstall . Also mention that is some particular version of ccleaner required to run .
Actually , this problem consumes so much of my time , so could you please tell how long (estimated) time will it take.
And finally , what is the reason of the hang up ?? i still cant get it??
Thanks in anticipation!!