Win7 problem after format and recover (lost disk space) urgent!!!!

i have win7 home edition 32bit given with my pc installed.
after a while i installed ubuntu 10.10 dual/boot and allocated 20GB as a partition to it.
dual boot worked fine i could use both os without problem
at some time i had some virus problems in win 7 and decided to format disk and reinstall.
i have no win7 installation disk but a win7 recovery disk given with the pc in order to use in these situations.
when i used the recovery cd before reinstalling windows i formatted disk (using the recovery cd to do it).
the rest of the install worked all right. however the problem is that now the 20GB of hard disk space allocated to ubuntu are lost. windows recognizes only the rest space and does not show any other partition. i also used easeus partition magic tool but got the same result.
what do i have to do to be able to use all disk space.
do full HD format with some option? and how?

Here is the My Computer/disk management screen shot. Sorry in Greek only.
Note that E: and G: are USB sticks not partitions. Only C: and the boot.

EDIT: I know Linux uses Ext2/3 type filesystem. But the partition should be visible. I even tried
partition programs that read several formats. to no avail..

Thanx for ur reply..

What is the mystery? You formatted the HD which wiped out everything including your Ubuntu 20gb, as should be expected. Even if you hadn´t formatted it as you say, running the Recovery Disks would have likely wiped out your Linux partition if you didn´t carefully select another option.

In the future use Disk Mgmt to shrink Win7 to make install space for Linux, although I would use a separate HD if possible if you plan to use GRUB which can corrupt Win7 beyond repair.

For operations which Disk Mgmt cannot do use free Partition Wizard bootable CD, not Partition Magic which will ruin Win7.

Check in Device Manager, that the drivers are installed for Disk 1.

The format should as the word says format the whole disk
and after all available space should be ready for any filesystem you like

if the partition is erased where is the space to recover it. Since it erased it it was at
least somehow visible to win7 why is it not now after format??

Anyway i think the format i did was only quick and maybe with full format on whole disk regardless of partitions should bring the space back. The problem is how to do it
without taking the HD off the computer and into other computer??

Thanx.

i think u r correct. i figured that it might be the address space and/or the
1000 1024 BYTE discrepancy. However i wasnt sure enough.

Thanx a million..

Sorry for your time..

Until next time..