well after reinstall i was shocked because my bios did not have slic in it ........although i used a dell slic added bios any how this time after reinstall i did not connected my pc to net ........ saved a copy of back up of bios .........which was created with amiflash using the latest AMI mod tool and added slic 2.1 for hp saved my copy of moded bios started my system in dos mode using afudos ver2.17 command flashed moded bios successfully system rebooted log on to win7 using Slic tool checked slic table in bios using opatool added certificate and key to activate win7 result successful activation of win 7 ........... thank you all who have contributed to forum.... special thanks to NoJuan999 for his interest and guidance........