i hv an hp notebook , it came pre-installed with vista home premium. i recently tried re-installing vista with the system recovery s/w which re-installs the vista from a partition (D) . but it gave the NTLDR missing error. PresS CTRL + ALT + DLT to restart. the booted well. but i am unable to uninstall vista from either the recovery software or by pressing F11 at boot. Else the system works fine.
How do i Re-install vista. I dnt have any vista DVD. i have earlier re-installed vista once before and it worked fine. i recently created a new partition: F by shrinking the C partition

It may be necessary for you to create a recovery disc and then restore your system to factory condition from there.