Load the windows ISO .
Change boot order to CDROM only.
Load windows installation and go to repair mode.
select 1
as windows and run this
copy e:\i386\NTLDR C\:
COPY e:\i386\NTDETECT.COM C:\
where e is the drive letter for your CD drive.
Go to solusvm and remove the media.
Change the boot order to (1) hard disk (2) cd rom
Reboot vps
Windows should work fine.