Win does not boot in Dualboot after partition-change

[Victoria]

Hello all,

I use a dualboot-PC with Win7/Debian Wheezy (7.3) and Grub2. I changed
the partitions from:

 Gerät  boot.     Anfang        Ende     Blöcke   Id  System
/dev/sda1            2048     3074047     1536000    7  HPFS/NTFS/exFAT
/dev/sda2         3074048   477841407   237383680    7  HPFS/NTFS/exFAT
/dev/sda3       477843456   915427327   218791936    f  W95 Erw. (LBA)
/dev/sda4   *   915427328   976773119    30672896   83  Linux
/dev/sda5       477845504   693424127   107789312    7  HPFS/NTFS/exFAT
/dev/sda6       693426176   906043390   106308607+  83  Linux
/dev/sda7       906043392   915427327     4691968   82  Linux Swap /
Solaris

to:

  Gerät  boot.     Anfang        Ende     Blöcke   Id  System
/dev/sda1            2048     3074047     1536000    7  HPFS/NTFS/exFAT
/dev/sda2         3074048   477841407   237383680    7  HPFS/NTFS/exFAT
/dev/sda3       477843456   915427327   218791936    f  W95 Erw. (LBA)
/dev/sda4   *   915427328   976773119    30672896   83  Linux
/dev/sda5       477845504   906039295   214096896   83  Linux
/dev/sda6       906043392   915427327     4691968   82  Linux Swap / Solaris

(This results from the initial partitioning with Win7 and I regret that
I did not partition the HD complete new, when I came to install Debian
on it...)

For the move I used Paragon-Backup-Software out of Windows as I am
familiar with it. But I was not happy when it told me to "reinitialise"
the bootloader if there is a Linux-Partition on the PC.

My problem is now: I may start Linux without problems (the good
message), but not Win7. (It tells me in german that the datas are
loading and stays at this message.)

Am I right that I have to do anything with grub? If yes, does anyone
have an advice for me what to do?

I have to say that I am all but a Linux-profi as I just since half a
year begin to learn to use it - with pleasure but of course not yet with
great "know-how"!

I would be glad about help,

Victoria