They certainly get into each other over there.
Hijackthis has a delete on reboot type app under misco tools.Don't know how good or if it works on Vista.
If anyone managed to grab the Paragon Partition Manager posted by Hazel there is an iso in it's program files install folder that you can burn to cd.
Booting from the cd will mount your partitions and you can the delete anything from there.
1984 are you trying to delete a file or just access one.
With Vista you can add the reg settings below that will add "Take Ownership" to your right click menu which when used will enable you to delete and or access most Vista files/folders.
CODE
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\*\shell\runas]
@="Take Ownership"
"NoWorkingDirectory"=""
[HKEY_CLASSES_ROOT\*\shell\runas\command]
@="cmd.exe /c takeown /f \"%1\" && icacls \"%1\" /grant administrators:F"
"IsolatedCommand"="cmd.exe /c takeown /f \"%1\" && icacls \"%1\" /grant administrators:F"
[HKEY_CLASSES_ROOT\Directory\shell\runas]
@="Take Ownership"
"NoWorkingDirectory"=""
[HKEY_CLASSES_ROOT\Directory\shell\runas\command]
@="cmd.exe /c takeown /f \"%1\" /r /d y && icacls \"%1\" /grant administrators:F /t"
"IsolatedCommand"="cmd.exe /c takeown /f \"%1\" /r /d y && icacls \"%1\" /grant administrators:F /t"