Can not find the HDDD

Hi,guys

There is a big problem with my laptop Aspire E1-471G,
OS is windows7 Ultimate. (bundled original os is win7 home basic,i installed the win7 ultimate)
yesterday, i wanted to delete the recovery partition(it is 13GB）, so i insert a install cd and go to the setup page, i could saw the partitions, so i select the recovery partition and choose the format option, message came out:"can not format it", so i choose "upload the drivers",problem came out: can not upload and then i could not find the HDD any more( no partitions any more)
turn off and install again , the same problem： can not find the hdd
even if changed the HDD model from AHCI to IDE, the same problem came out.
i downloaded a AHCI driver to my usb and could not fix the problem.

in addition, i can not access into the os( starting windows.. then blue screen comes out)
i had tried press F8 and all of the following choices in the F8 had the same problem(blue screen)

so, dear friends, is there any one meet the same problem before?
how to solve it?

appreciate if you could reply here or contact by skype: ericlawgd
tks very much.

 

Press F2, look in the boot section of the motherboard, see if the hard drive is listed if it is listed, then your problem is a software problem. Blue screens are usually Microsoft software crash. Go this site load SUPER FDISK and format your harddrive,then reload your operating system via disks. http://www.freewarefiles.com/search...er+fdisk&boolean=exact&type=all&B1.x=0&B1.y=0