missing registry

hi,
can anyone help??
i had xp sp2 and vista ultimate happily installed on my pc.one day i booted to vista and it told me i had 2 files named 'c' did i want to rename one? i stupidly clicked yes. booted up in xp and got nothing, since this is my main os i tried to get it back using my xp full disk's repair,not really knowing what i was doing i must have disabled something coz now i can't get vista(not that i'm bothered)or xp to load. vista tells me that the partition is not enabled (in bios) and xp loads the files but when it reboots it starts install from scratch not from hd.i tried repair -enable-all and it tells me/ ''the system does not appear to have an active controlset key'' and ''the service is missing the start value key''
i can only boot xp disk
i've tried bootfix and loads more,nothing boots up,
help me pleeeeeease.....:cry

 

have you tried to get a free registry fix online?
If not try this site www.regclean.com

 

micky 1020
hi,i have deleted xp & vista, the problem (i think )lies in the registry i have put in a different hard drive but still no go for xp or vista,

 

hi can anyone tell me how to install a bootable os , i dont care if i loose all data on hd, can i format whole hd and start new??