Window 7 Cant Install Again

Hi All,
now i have big problem i try but cant solve.i hope someone can slove here.
i have one hard drive on two partition C & D.
on C partition is WINDOW 7, D partition WINDOW XP HOME i have this problem in xp home Error message: "Windows could not start because of a computer disk hardware configuration problem" last time 2-3 times have same this problem i solve to use Method 2 but this time i cant solve so i try to upgrade window pro but cant upgrade i see the message
error loading operating system
then i cant open also wndow 7 after i try to agian install window 7 but after restart pc i see only this message press any key to boot from cd or dvd.....
cant work after this merssage.pls help me urgent bcoz i dont want to carry for repair.Thx very much
DB

dbasia said:

i see only this message press any key to boot from cd or dvd.....

Press any key and it will boot from the DVD. Use that to install Windows 7 to your C: drive, formatting the C: drive first using setup if you don't have any important data on it.

Hi Sup3rsprt....Thx for help..i press enter after see this message but nothing happen didnt work start downloading.i have important data inside so i dont want format.Thx

If you can't get into Windows, then you need to be able to boot from the Windows 7 DVD in order to fix this. Because the tools to fix it are on the DVD. (Startup Repair)

Go into the BIOS and select the DVD-ROM as the first boot device. Also make sure USB keyboard support is enabled in the BIOS. Because if you press a key and it doesn't work, something is wrong.