Need to backup data on vaio vgn-t170p

Files missing or corrupt.
I would re load windows.

You need to have a operating system's disc because you would need to load the bootmgr from it. Insert the disc and start your computer. Your computer will ask you to boot to the cd. Hit enter and run a start up repair so that the missing system file will be added.

I hope this helps!

David

What version of windows? This could mean the hard drive is getting ready to fail. You may be able to repair it using start up repair.

There are a number of possible causes for BOOTMGR errors, including the most common "BOOTMGR is missing" error message.

The most common reasons for BOOTMGR errors include corrupt and misconfigured files, hard drive and operating system upgrade issues, corrupt hard drive sectors an outdated BIOS and damaged or loose IDE cables

Anothe reason you might see BOOTMGR errors is if your PC is trying to boott from a hard drive or flash drive that is not properly configured to be booted from. In other words, it's trying to boot from a non-bootable source. This also would apply to media on an optical drive or floppy drive that you're trying to boot from.

make sure there are no disks in cd floppy usb drives

Test all leads that attach to your hard drive including electrical extensions IDE,SATA

the leads from your ((MOTHERBOARD TO YOUR HARD DRIVE)) make sure they have a secure dust free connections and are not faulty or just replace them they could be faulty

if its a flat ribbon 40 pin IDE it will be the fist to fail

make sure all leads that are attached to your drives dvd\cd have secure connections and are not faulty even the electrical extensions or just replace them they could be faulty a computer needs data and power to travel through every working device and to continue its cycle and to have an end so any faulty leads will end up with a computer error
also make sure you have set it boot from you hard drive in BIOS

hope this helps

Causes of BOOTMGR ErrorsThere are a number of possible causes for BOOTMGR errors, including the most common "BOOTMGR is missing" error message.

The most common reasons for BOOTMGR errors include corrupt and misconfigured files, hard drive and operating system upgrade issues, corrupt hard drive sectors, an outdated BIOS, and damaged or loose IDE cables.

Another reason you might see BOOTMGR errors is if your PC is trying to boot from a hard drive or flash drive that is not properly configured to be booted from. In other words, it's trying to boot from a non-bootable source. This also would apply to media on an optical drive or floppy drive that you're trying to boot from. Fixes for BOOTMGR Errors

1. Restart the PC. The BOOTMGR error could be a fluke.
   
   
2. Perform a startup repair of Windows. This type of installation should replace any missing or corrupt files, including BOOTMGR. Continue troubleshooting if this does not resolve the issue.
   
   
3. Check your floppy and optical drives for media. Often times, the "BOOTMGR is Missing" error will appear if your PC is trying to boot to a non-bootable floppy disk or CD/DVD.
   
   Note: If you find that this is the cause of your issue and it's happening regularly, you might want to consider changing the boot order in BIOS so the hard drive is listed as the first boot device.
   
   
4. Check the hard drive and other drive settings in BIOS and ensure they are correct. The BIOS configuration tells the computer how to use a drive so incorrect settings can cause problems, including BOOTMGR errors.
   
   Note: There's usually an Auto setting in BIOS for hard disk and optical drive configurations which is usually a safe bet if you're not sure what to do.
   
   
5. Reseat all internal data and power cables. BOOTMGR error messages could be caused by loose or malfunctioning power or controller cables.
   
   Try replacing the PATA or SATA cable if you suspect it might be faulty.
   
   
6. Update your motherboard's BIOS. An outdated BIOS version can sometimes cause the "BOOTMGR is Missing" error.
   
   
7. Perform a clean installation of Windows. This type of installation will completely remove Windows from your PC and install it again from scratch. While this will almost certainly resolve any BOOTMGR errors, it's a time consuming process due to the fact that all of your data must be backed up and then later restored.
   
   If you can't gain access to your files to back them up, understand that you will lose them all if you continue with a clean installation of Windows.
   
   
8. Replace the hard drive and then perform a new installation of Windows. If all else has failed, including the clean installation from the last step, you're most likely facing a hardware issue with your hard drive.

BOOTMGR Errors Apply To BOOTMGR issues apply to Windows 7 and Windows Vista operating systems only. Windows XP does not utilize BOOTMGR. The equivalent function in Windows XP is NTLDR


Whish you the best luck.

First try this, http://esupport.sony.com/perl/select-system.pl?PRODTYPE=1,24,26,66,9,70,5,72 Option 1. "Detect My Model" on the right pane. If this doesn't help, try here again, drivers for sony via vgn-t170 series Currently there's no drivers for windows 7 but on most systems this works. Good luck. Thanks for using FixYa.

Visit to the given link.
http://esupport.sony.com/US/perl/swu-list.pl?mdl=VGNT170P
Please rate the answer

copied the corrupt system file (windows directory\system32\config\system) into a temporary directory, and copied the default microsoft backup (windows directory\repair\system) over the corrupt file.
http://www.computing.net/security/wwwboard/forum/16358.html

This means that the operating systems was not installed properly...."Boot manager is failed... and ntldr is the main file... which help computer to boot up..." try reinstalling the operating system again...

u will have to reformat the hard drive and load win 98 or win xp whichever u want to fix this

you can have more detailed info at
http://www.computerhope.com/issues/ch000474.htm