The girlfriends Packard Bell computer.
After asking me over to sort out her lack of broadband (well it's a novel chat up line!), she tells me that everytime she boots up her pc, that she gets a message that "Windows failed to start. A recent hardware or software change might be the cause. To fix the problem - Chose "repair your computer""

Apparantly normally the pc goes through the sort of self-repair process & all is ok. But this time (with me!), the Packard Bell repair process seemed to work, but windows went for the re-start & then failed to start & the Windows Boot Manager started again.

Got error msg - Status 0xc000000f

Info- The boot selection failed because a required device is inaccessible.

Then some gubbins about inserting Vista disc to attempt repair (which not got) & contacting vendor for assistance.
Pc is she says about 3 yrs old.
I know that Recovery sector is on hard drive, but how can I access it.
She's ok data wise to do Factory settings or similar to actually get Vista & working pc back but how can I do that if can't get to Recovery sector to do so?
Any kind of DOS way? I should be able to do that if given instructions. Help!