hi guys,
thanks for the link,.. but it didn't help...
I even deleted all of the partitions, than made 2 new partitions, formated them,...
restarted just to be sure the GRUB loop is gone,....but I still get the GRUB,.. not the loop but written just once, until I reboot again,....
finally I installed windows again, and that made the GRUB problem go away...now it boots just fine,...
Im clueless what happened, but Im glad it worked, cos for the moment I thought I would need to replace my HDD...
Thanks for the link....
it will come handy for sure....