[Vishal Sharma]

Hello, friends
I have installed windows 7 and i want to switch back to windows XP.But I am not able to install it.All the time it gives a blue screen and.This is being happening after the installation of windows 7.
I formatted the partition once even then the same problem.
Problem: Unable to Install Xp
Error:
Before formating partition: Blue screen & Stop: c0000221/ unkown Hard error
\systemroot\system32\ntdll.dll

After formating partition: Boot MGR missing press ctrl+alt+Del to restart
System Confrigation:
OS: Window 7 Home basic(EM) currently working fine.
Motherboard: DG41TY
Processor: Intel Core2Quad
Ram: 4GB
Hard disk:
1. SATA-HITACHI-HDT721-320.0gb
2. SATA-SAMSUNG-HD161G-160.0gb
Things I have already tried:
1. Foramte the partition having window
2. Updated BIOS from intel site.
3. Drive Confrigation at Bios set up: ATA/IDE [Native]
4. Boot drive priorty: [CD/DVD-ROM drive]
5. Unable to use NLITE Software
Status: it copy window file. Nlite not colaborating bios update to burn new bootable disc.
6. Unable to find drivers for SATA

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You should use a third party program to completely erase all data on your hd (not just a simple format which will not ersae all the data on the MBR or the boot sector).

Windows XP will not install over windows 7 if it sees any trace that a newer OS version was installed on an HD.

By erasing completely your HD you should have no problem installing XP.

You can try the free program Darik's Boot and Nuke (DBAN) to erase your hard drive, download the bootable iso image and burnt it to a cd.
http://www.dban.org/download

[Alzeimer]

You should use a third party program to completely erase all data on your hd (not just a simple format which will not ersae all the data on the MBR or the boot sector).

Windows XP will not install over windows 7 if it sees any trace that a newer OS version was installed on an HD.

By erasing completely your HD you should have no problem installing XP.

You can try the free program Darik's Boot and Nuke (DBAN) to erase your hard drive, download the bootable iso image and burnt it to a cd.
http://www.dban.org/download

[Vishal Sharma]

Dear Friend

Thanks for your valuable time. Complete Formate Disk works. But another problem arose. most of software(printer F370 64bit) i have stop working. Now i m able to install xp but error comes window stop software to edit registry. have tried fresh & alot of window xp professional 64 bit edition.

Thanks again for your help

Regards
vishal Sharma