Inaccesible partitions after Windows 7 install

I have installed Windows 7 next to my old Windows XP (so it's a dualboot situation). I have 2 physical HDD's (320 GB each) and 6 logical drives (2 + 4 primary partitions, all NTFS). After installing Windows 7, two of 4 partitions in one hdd have become inaccessible - disk manager still shows them, but I can't neither set a drive letter, nor view properties. I get the following error:

"The operation failed to complete because the Disk Management console view is not up-to-date. Refresh the view by usin the refresh task. If the problem persists close the Disk Management console, then restart Disk Management or restart computer."

Both of the inaccessible partitions are fine in Windows XP. Any ideas or solutions ? ;/

Please post a screenshot of 7 Disk Management.

I would like to see a screenshot of Disk Management in both XP and 7.

Just to be on the safe side of things, have you fiddled around on the inside of the computer? if you have make sure that all the cables are firmly connected, and check that the bios recognises these.
If this has been checked and still doesn't work in disk management, try searching google, or telling us your hard drive model numbers, and we will see whether this is a common incident or whether that it requires drivers as such

Here are the both screens.

Cables are ok, bios recognizes perfectly (I probably would know what to do if the problem appeared the same in both WinXP and W7).

Samsung HD321KJ
Seagate ST3320613AS

Hi laikinasis

Try this to assign a letter

1. Click Start and in Search programs and files box type CMD
2. From top of Start menu under Programs (1) right - click CMD > Run as administrator
3. At the Command prompt _ type Diskpart and press (ENTER)
4. Type List Disk (ENTER)
5. type Select Disk K ( K = your Disk Number) (ENTER)
6. Type List Partition (ENTER)
7. Select Partition k (k = the partition you want) (ENTER)
8. Type Assign (ENTER)

No luck:

DISKPART> list disk

Disk ### Status Size Free Dyn Gpt
-------- ------------- ------- ------- --- ---
Disk 0 Online 298 GB 7168 KB
Disk 1 Online 298 GB 0 B

DISKPART> select disk 1

Disk 1 is now the selected disk.

DISKPART> list partition

Partition ### Type Size Offset
------------- ---------------- ------- -------
Partition 1 Primary 19 GB 31 KB
Partition 2 Primary 48 GB 19 GB
Partition 3 Primary 97 GB 68 GB
Partition 4 Primary 132 GB 166 GB

DISKPART> select partition 4

Partition 4 is now the selected partition.

DISKPART> assign

There is no volume specified.
Please select a volume and try again.

DISKPART> list volume

Volume ### Ltr Label Fs Type Size Status Info
---------- --- ----------- ----- ---------- ------- --------- --------
Volume 0 G DVD-ROM 0 B No Media
Volume 1 D Sisteminis NTFS Partition 34 GB Healthy System
Volume 2 S Nuotraukos NTFS Partition 263 GB Healthy
Volume 3 X Cache NTFS Partition 19 GB Healthy
Volume 4 C Windows 7 NTFS Partition 48 GB Healthy Boot

I'm curious if you could repartition the two drives in Windows 7 after you backed up all data to a different drive from XP.

Repartitioning is out of the question, since I'm just trying to make Windows 7 work properly, yet it's not my main OS. Also, I don't have a spare drive to make backups...