Mylaptop turns on but not respond

did you see the splash screen of your acer computer?is this happening before the windows logo?

It may be a problem with the hard disk drive. To check, try to boot to the BIOS. Turn the computer on and tap on F10 before the Acer splash screen. Once you are in the BIOS, check if there is any hard disk drive being detected by the computer. Look for any SATA device that will have a storage capacity. If it does not show such, then you have to replace the hard disk drive of your computer. Unfortunately, the data goes together with this device. It will be very expensive to retrieve it from a damaged hard disk.
If in case the hard drive is seen, then it is just an OS problem. The MBR is corrupted. To fix this issue you need to boot from the installation CD.
For XP: boot to the WinRC.
Tap on F12 on before the splash screen. You will have an option to boot from the CD. Load the WinXP CD and choose onboard or usb cd rom drive.
On the setup screen choose R to repair. The follow the prompts until you get a black screen.
On this black screen, type fixmbr then press on return. That should do it.
If it does not work, then you just need to have your Hard disk replaced.

Yuo need a lot of try and error to be successful.
First your OS and the BOOT disk that comes with your machine.But if you dont had the CD you need to buy and download it.
Store like Bestbuy,CompUSA,etc.. sell this CD,s or go to this LINK where you can buy it online and download it, choose your OS and any other specs about your System.
After all you need to BURN the files in a blank CD or order for mail shipment.

Then we going to BOOT the system id the CD drive.

To rebuild your hard drive, do the following:

1. Power up your Acer system.
2. When prompted (after memory testing completes), press CTRL + ALT + ESC to enter CMOS setup.
3. At the CMOS Setup screen select Advanced BIOS Features
4. Verify the Boot Options Sequence is set to the following order:
   1st [CD-ROM]
   2nd [Floppy Disk]
   3rd [Hard Disk]
5. Insert the Acer System CD, DISK 1 in your CD-ROM drive.
6. Press F10 to exit and save. When prompted, Do you want to save CMOS data?, select [Yes], then press ENTER.
7. The system will reboot from the CD-ROM. After booting from the CD-ROM, you will see the Acer Hard Drive Rebuild options displayed.
   
   Note: Use your mouse for choice selections during the HDD recovery process. The mouse will respond slowly during this procedure, DO NOT press the Enter key. Pressing the Enter key will cause the HDD recovery process to terminate.
   
8. Select HDD Full Rebuild and follow the on-screen instructions.
9. When prompted to insert Acer Recovery CD, DISK 2, wait for the CD-ROM to eject DISK 1.
10. Close the CD-ROM tray and click OK. The system will continue to rebuild the hard drive back to factory load.

After being prompted to remove disk and restart system the unit will load system software and hardware. During this process the system will reboot several times.
Your Microsoft Certificate of Authenticity (COA) ID number will automatically be entered for you. Should you need this number for any reason, look for your Microsoft Certificate of Authenticity (COA) ID number on the cover of your system.

"thumbs and post back!"

It seems your OS is corrupted with virus. please do a scan using a bootable CD of antivirus like Norton Rescue Disk

well i think you are asking for to use your dell cd to install in your sister's laptop.maybe it will not work because they are specific system configured .you can't use them everywhere.

go to acer website ...go to dowloads section..select ur model ..n download latest bios

That is a Vista problem with ACER. Delete the reference in device manager and restart and let the comp reco0gnize and reinstall ...just follow the screen instructions.

There is a registry setting that needs deleting but only if this doesn't work.

remove all the external devices like HDD printer camera or fax and reset the bios and try to load the system and try in safemode also

Open BIOS and configure your boot devices priority. First boot device should be the hdd. Also check if the laptops see the hard disk, i think your hard disk have a problem and thats why laptop wants to boot from network.

check your cd/dvd rom drive for a disk. Remove any USB devices, and reboot.

good luck