Windows 7 - os missing..need respond immediately

my pc show os missing when i open it this morning..recently i have done resizing my c partition,n unfortunetely the process is hang before it fully complete , n then i restart it,after that my screen just show error message "os is missing"..i try to use the repair method by using my window 7 bootable thumbdrive..but i got another problem..i cant boot via my thumbdrive,it keep saying a disk read error occured n press cntrl-alt-del to restart..for ur infomation 2month bfore i install my window7 SUCCESFULLY by using that pendrive, but today my bios cant read my thumbdrive?why? n off course i already set the usb flash as the first on my boot order..anyone can help me solve this problem plz....

i use amibios american megatrend

boot from the dvd and reinstall...

i dont have any dvd rom n also dont have any window 7 dvd ..

try this Startup Repair if this doesn't work see if you can acquire an iso for windows 7.

EDIT nvm that requires the disk. when you first boot your pc before it attempts to load windows a screen should flash with some function(F#) key commands, one should be for a start up or system repair often it's F11 but sometimes a different key check and press and the key at that screen, this may take a couple of tries to get the timing right.

Then you will need to redownload the iso and set up your flash drive up all over from the begining...sorry

my bios use f8 to enter anvance boot option..but mate..i even cant enter my advance boot option.it still give me an error os missing..that why i guess i just have one choice only, repair by using my window 7 bootable pendrive...do u have other method except than promp me to use dvd..

the best bet then is to find a windows 7 iso for your version and use it to reinstall. just be careful which one you grab.

yeah.i already have it,but it in my pendrive.my problem here is i cant use my bootable pendrive that contain my window 7 iso setup to repair my windows 7..that is the problem..i dont know why when i try boot via pendrive its keep saying ,'disk read error occured n press cntrl-alt-del to restart'..i already test my pendrive at my others laptop and it can boot via my pendrive..so now i know,my pendrive is ok,n i already know my bios support booting via pendrive,so now,why i still cant boot via my pendrive?

Were you ever able to boot the pendrive? Are you trying the BIOS shortcut key given on first bootup screen for Boot Menu? Flash stick may be listed as HD.

If not, then you may need to try another method to write the ISO to the stick:
Windows 7 USB/DVD Download Tool
USB Windows 7 Installation Key Drive - Create
http://neosmart.net/blog/2009/window...-repair-discs/

Or use a DVD to boot to run Startup Repair repeatedly until Windows 7 starts.

lastly i confgure myself why my bios cant boot via usb...then i can boot v ia pendrive back..k i already use system recovery,system repair run command n lastly try to do a start up repair, via my pendrive,but still i cant get my os back..so last choice,i do the fresh install...so guys thnks alot for help me n give me ur opinion ..thnks