freeze , crash and lost my partition

Oh tnx....

Hmm, I recognize this.

I have been involved in cases when Windows "somehow" corrupted the system partiton and when installing Windows again, despite formatting from the setup menu, it will with some time keep corrupting the partition, unless you do a low-level-format of the harddrive it self before doing a new installation. That is, using a manufacturer tool to wipe the drive clean.

Since you have not installed windows yourself I can not recommend you to do this, but you could ask the guys at the computer shop if they can get SeaTools and make sure the harddrive is 100% clean before doing next setup, unless you may want to do this yourself.

They may of course tell you that you are questioning their professional knowledge and tell you that "of course we wiped the drive", so be a bit diplomatic when asking. I have been doing stuff like this for 20 years. And so has many others on this forum.

Tnx for helping me Dear coram..

Well, don't thank me or anyone else until you know our advice works. :)

Maybe. If the cause is what I think, and the harddrive was not wiped before, it will at least make sure there is nothing left that can cause errors related to the file system.

Excellent.
Now, while the new computer is 100% functional, I recommend making a System Image backup so that you can always put the computer back into a working condition.

You will need an external USB disk to save the image.

You will need to made a Win 7 System Repair Disc go use to restore or in case of other disasters.

Here's how to make the Win 7 System Repair Disc:

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CREATE A SYSTEM REPAIR DISC

START | type System Repair | Enter key | Create Disc button


Here's a tutorial on making a SYSTEM IMAGE BACKUP.

Backup Complete Computer - Create an Image Backup