My computer is an Acer Aspire 4920G laptop.When VISTA Load comes to password prompt.But in the password prompt box have some automatically typed text.so i always delete that dots and type my exact password.

Windows operating systems allow you to set up an administrator password, which prevents unauthorized users from downloading applications and making system changes without your permission.
If you have forgotten your administrator password, you can reset it easily and create a new one that you can use to log into Windows.
Since Acer Aspire computers use Windows operating systems, resetting your password is a simple process you can accomplish in minutes.

Restart the Acer Aspire. When Windows boots up, select the username you want to reset the password for and press "Enter."
Click "Use your password reset disk" to launch the password reset wizard.
The password reset wizard enables you to create a new password for your user account.
Click "Next" on the password reset wizard and insert the password reset disk.
Click "Next."
Type your new password in the "Type a new password" box and type the password again in the confirmation box.
Type a hint to you use in case you forget your password next time.
Click "Finish" to activate your new password.
Restart your computer and log on to Windows using your new password.
Reset your Windows password
http://windows.microsoft.com/en-US/windows-vista/Reset-your-Windows-password

Windows operating systems allow you to set up an administrator password, which prevents unauthorized users from downloading applications and making system changes without your permission.
If you have forgotten your administrator password, you can reset it easily and create a new one that you can use to log into Windows.
Since Acer Aspire computers use Windows operating systems, resetting your password is a simple process you can accomplish in minutes.

Restart the Acer Aspire. When Windows boots up, select the username you want to reset the password for and press "Enter."
Click "Use your password reset disk" to launch the password reset wizard.
The password reset wizard enables you to create a new password for your user account.
Click "Next" on the password reset wizard and insert the password reset disk.
Click "Next."
Type your new password in the "Type a new password" box and type the password again in the confirmation box.
Type a hint to you use in case you forget your password next time.
Click "Finish" to activate your new password.
Restart your computer and log on to Windows using your new password.
Reset your Windows password
http://windows.microsoft.com/en-US/windows-vista/Reset-your-Windows-password
or
Restart your computer repeatedly tapping the f8 key to enter safe mode while the screen is black once in safe mode where the only things working will be your keyboard and mouse allowing you to attempt to repair your computer
Windows Advanced Options Menu
Please select an option:
Safe Mode
Safe Mode with Networking
Safe Mode with Command Prompt
Enable Boot Logging
Enable VGA mode
Last Known Good Configuration (your most recent settings that worked)
Directory Services Restore Mode (Windows domain controllers only)
Debugging Mode
Start Windows Normally
Reboot
Return to OS Choices Menu
Use the up and down arrow keys to move the highlight to your choice
select safe mode with command prompt
Click start run type cmd press Enter
black screen should open DOS mode
this will vary depending on your operating system
type in net user username
For eg. If you want to change administrator password , type net user Administrator
It will prompt you to enter the new password.
Enter the new password and the password is changed
http://wiki.ljackson.us/Control_Userpasswords2
if this fails you will need to
Select safe mode with networking to download
you could download all of these or just one save them to a usb drive for later use if one fails to remove the password
Windows Password Recovery Basic
http://majorgeeks.com/CmosPwd_d239.html
A CMOS BIOS password recovery tool
Editors note: This tool should only be used by experienced computer users.
Please see the enclosed read me if you would like to run it from Windows.
Failure to follow instructions (from Windows) will cause your anti-virus to flag this as a virus.
http://majorgeeks.com/Dr._Freeware_System_Utilities_d6416.html Dr.Freeware System Utilities which includes data recovery software, data backup, password

Forgot laptop password, you can reset laptop password by Smartkey Windows PasswordRecovery. http://www.recoverlostpassword.com/products/windowspasswordrecovery.html

Acer Aspire eRecovery
The Acer Aspire eRecovery tool comes in both a DOS and a Windows version with the Windows version offering more features. To open the DOS version, boot up your computer and press the Alt + F10 key combination when you see the Acer splash screen. To open the Windows version, allow Windows to load and then open Acer eManager followed by double-clicking the eRecovery link.
Using the eRecovery tool is fairly simple once you have it launched. You can either restore your Acer Aspire to factory settings from the hidden partition or with the recovery CDs. Once eRecovery loads, you may be prompted to enter a password. According to Acer, the default password is: 000000. If you have not changed the password, enter these six zeros when prompted.

Select models have the ability to have the operating system reinstalled from a hidden drive built into the computer.

To start the system recovery:

1. Restart the netbook.
2. When the Acer logo appears on the screen, press the Alt and F10 keys repeatedly.
3. If you are prompted with a Microsoft Windows boot screen, press the Enter key.
4. After the system recovery program has loaded, follow the prompts to reinstall the Operating System.
5. Select ' completely restore to factory defaults '

My advice to you is technical. You need to reset the CMOS on the motherboard internally. As for the password in vista unless you know it you will more than likely have to re-install vista or do a systme recovery by using the e-recovery partition that comes stock with ACER computers. I do not advise you to try resetting the cmos if your not technically capable

yes there is
login with ur normal user profile
go to run>>type cmd
in the black box...
type net user administrator
it will give u options to change the pwd for administrtaor

Hi

1 > Check in the safe mode - To access the safe mode need keep tap on F8 key

> Need select the Safemode if it is the same

2> Check in the safe mode with command prompt

Type this command

%systemroot%\system32\restore\rstrui.exe,

Follow this steps for xp system restore

http://support.microsoft.com/kb/306084

Follow this steps for vista system restore

http://www.howtogeek.com/howto/windows-vista/using-windows-vista-system-restore/


With Regards

[email protected]

To repair your computer using Startup Repair follow these steps:

1. Boot into Vista installation DVD
2. Choose your language settings and click Next
3. Click Repair your computer
4. Choose your operating system and click Next. This should bring up System Recovery Options.
5. Click on Startup Repair

Startup Repair should now start diagnosing your system to identify the root cause of the failure. Once it has identified the root cause, it would automatically start repairing your computer. If you are curious to know what Startup Repair did, you can click on the details link and see which tests Startup Repair ran to diagnose the problem.
After Startup Repair has finished the repairs, click Finish to reboot your computer.
Your computer should now be able to boot normally into Vista!!
Note -- If your computer cannot boot into Vista even after repairs, then go back to System Recovery Options and run System Restore.
That's it! This is how you use Startup Repair for most unbootable situations.

Did your Acer laptop come with Vista installed or did you purchase it and install it yourself?