LinuxQuestions.org - Primary boot sector is invalid

Hi,
I have upgraded from Debian Sarge to Etch.
Until now I cannot boot windows form my first partition with grub.
error:

Code:

Filesystem type unknown partition type 0x7

Furthermore I get this messages while I'm booting Debian:

Code:

NTFS driver 2.1.25 [Flags: R/W MODULE].

NTFS-fs warning (device hda1): is_boot_sector_ntfs(): Invalid boot sector checksum.

NTFS-fs error (device hda1): read_ntfs_boot_sector(): Primary boot sector is invalid.

NTFS-fs warning (device hda1): read_ntfs_boot_sector(): Hot-fix: Recovery of primary boot sector failed: Read-only mount.

NTFS-fs warning (device hda1): read_ntfs_boot_sector(): Using backup boot sector.

NTFS volume version 3.1.

Here is my win-related part of my /boot/grub/menu.lst:

Code:

# This entry automatically added by the Debian installer for a non-linux OS

# on /dev/hda1

title          win

root            (hd0,0)

savedefault

makeactive

chainloader    +1

And finally my fdisk -l:

Code:

Disk /dev/hda: 250.0 GB, 250059350016 bytes

255 heads, 63 sectors/track, 30401 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes



  Device Boot      Start        End      Blocks  Id  System

/dev/hda1  *          1      12748  102398278+  7  HPFS/NTFS

/dev/hda2          12749      30401  141797722+  f  W95 Ext'd (LBA)

/dev/hda5          12749      16572    30716248+  b  W95 FAT32

/dev/hda6          16573      16576      32098+  83  Linux

/dev/hda7          16577      29585  104494761  83  Linux

/dev/hda8          29586      29707      979933+  83  Linux

/dev/hda9          29708      30315    4883728+  83  Linux

/dev/hda10          30316      30401      690763+  82  Linux swap / Solaris

What can I do?