freeze , crash and lost my partition

If your computer is unstable/problematic and still under warranty why not return it ?

Tnx pauly for replying me. For the last couple of month I send back my laptop to the service centre at least 4 times while I faced that prob. They returned it to me after creating new partition & set up new windows. But after 6/7 days this not works anymore. I have faced same problem again and again. But the last time when they returned to me, they said they changed all the parts except the body. Till now partitions are not broken down but from the last couple of days I have face the same symptom. sometimes it hanged shows blue screen dump error and restarted automaticaly, , sometimes appears in white sceeen and most of the time need to manual restart.that shows start windows normally coz windows not properly shutdown.. I really can't understand what the exact prob & what shoud I do.... Plz help

Well we aren't telepathic. We have no superpowers. We need your help to help us to help you.

What country are you in? Strangely enough, that may help give a clue.

Does your computer run? Yes/No.

Are you reading/sending posts in this forum using the problem computer or using another computer?

Help us please.

I would ask many more questions, however, we need to know if the computer runs.

OK. Now be sure that your computer is not overheating.

Depending upon where you are in Bangladesh, you could be having problems with the computer becoming too hot.

An easy way to keep an eye on your temps is with SPECCY (link in my signature).

You can also use Core Temp (link in my signature)

Need info about your computer:
Please carry out following:
Update your SevenForums System Specs
User CP (located on the top menu bar) |
Your Profile | Edit System Spec (left-hand column)

To gather info, use Speccy (my favorite) or SIW or System Info

In the System Manufacturer Block, enter:
Manufacturer and Model and
ADD the word laptop, desktop, netbook or tablet.
For example:
Toshiba Satellite L305D notebook.

Provide full windows version info, for example:
MS Windows 7 Ultimate SP1 64-bit

Use the “Other Info” block for Optical Reader,
Mouse, touchpad, wifi adapter, speakers, monitor, etc

Scroll down and click on SAVE CHANGES.

You will find that in Speccy, you can select info from the display
using your mouse/touchpad and then paste that info into your specs.

SIW is a marvelous program, but the free version does not offer
this capability.

=================================================

Please execute following:
HOW TO USE WINDOWS DEFENDER OFFLINE ON A USB STICK
Windows Defender Offline
· is a free standalone, bootable malware and virus remover from Microsoft.
· performs an offline scan of an infected PC to remove viruses, rootkits and other advanced malware.

Download Windows Defender Offline (about 764 kB)

You will have the choice of downloading the 32bit version (x86) or the 64 bit version (x64).
The link will help you determine whether you are running a 32 bit version or 64 bit version of Windows

NOTE!! You can download and prepare a 32 bit version using a 64 bit version of Windows
NOTE!! You can download and prepare a 64 bit version using a 32bit version of Windows.

You run the 32 bit version on a 32 bit version of Windows.
You run the 64 bit version on a 64 bit version of Windows.

The 32 bit download file name is: mssstool32.exe
The 64 bit download file name is: mssstool64.exe

For the curious, this program was originally name Microsoft Standalone System Sweeper.


INSTALLATION:
You will need an Internet Connection.
Insert 512 mB (Microsoft’s 256 mB is no longer accurate) or larger USB stick into a usb port.
Run the downloaded program--mssstool64.exe or mssstool32.exe
NEXT button
Choose the option On a USB flash drive that is not password protected
NEXT button
NEXT button
.
The install program will format the usb stick using the NTFS format.
The install program will download about 210 mB.
The install program will name the USB stick WDO_Media32 or WDO_Media64
The WDO_Media32 usb stick will have used space of 255 mB (268,140,544 bytes)
The WDO_Media64 usb stick will have used space of 282 mB (296,165,376 bytes)
You can expect the number of mB to increase as more malware appears.

UPDATE Windows Defender Offline USB stick:
· reinsert the usb stick
· run the installation program, mssstool64.exe or mssstool32.exe, again.
· the update will download about 66 mB (mssstool32.exe) and 68 mB (mssstool64.exe).

Since the malware database is sometimes updated several times in a day, always update before running.

PERFORM AN OFFLINE SCAN
Bootup your computer from the USB stick
Windows Defender Offline will automatically perform a quick scan.
After the quick scan finishes, Choose Full Scan
Select all of your drives

The initial, full scan can easily take several hours, but
Remember, your computer is being very thoroughly checked for all types of malware.


RESULTS OF THE SCAN
The results will be in 4 log files on your computer's disk in:
\Windows\Microsoft Antimalware\Support

===========================================
===========================================

After, and only after running WDO, then execute the following and upload the resulting zip file:

Script:

# ************************************************************
# Zips up your log files from Windows Defender Offline
#  and extended info about the log files
# Places WDOlogs.ZIP on your Desktop
#
# **********************INSTRUCTIONS**************************
# STEP 1 *****************************************************
# RUN PowerShell as administrator
# START ORB | type POWERSHELL | CTRL+SHIFT+ENTER key combo | ALT+Y keycombo
# ************************************************************
# STEP 2 *****************************************************
# COPY, using CTRL+C, every line down thru both EXIT statements 
# PASTE into Powershell == Right-Click at the PowerShell Prompt
#  (Ctrl+V does not work)
# Start copying with first line without a # at start of the line
# Note: Actually, you can paste the entire file if you rather
#       Lines starting with a # are ignored by PowerShell
# ************************************************************
#functions

function New-Zip {
    param([Parameter(Mandatory=$true, Position=0, ValueFromPipeline=$true)]
    [String] $Path, [Switch] $PassThru, [Switch] $Force )
    Process { if (Test-Path $path) {if (-not $Force) { return } }
    Set-Content $path ("PK" + [char]5 + [char]6 + ("$([char]0)" * 18))
    $item = Get-Item $path; $item.IsReadOnly = $false;if ($passThru) { $item } } }
function Copy-ToZip {param(
  [Parameter(Mandatory=$true,Position=0,ValueFromPipelineByPropertyName=$true)] [Alias('FullName')] 
  [String]$File, [Parameter(Mandatory=$true,Position=1)] [String]$ZipFile,[Switch]$HideProgress,[Switch]$Force )
  Begin {$ShellApplication = New-Object -ComObject Shell.Application
  if (-not (Test-Path $ZipFile)) {New-Zip $ZipFile};$Path = Resolve-Path $ZipFile
  $ZipPackage =$ShellApplication.Namespace("$Path")}
  Process {$RealFile = Get-Item $File; if (-not $RealFile) { return }        
  if (-not $hideProgress) {$perc +=5; if ($perc -gt 100) { $perc = 0 } 
    Write-Progress "Copying to $ZipFile" $RealFile.FullName -PercentComplete $perc}
  $Flags = 0; if ($force) {$flags = 16 -bor 1024 -bor 64 -bor 512};Write-Verbose $realFile.Fullname
   $ZipPackage.CopyHere($realFile.Fullname, $flags);Start-Sleep -Milliseconds 500}}

$fileinfo = join-path $env:TEMP \wdofileinfo.txt
IF (test-path $fileinfo) {del $fileinfo -ea:silentlycontinue -force:$true}
$dir = $env:windir + '\Microsoft Antimalware\Support'
$a = dir $dir  -rec -force -ea:silentlycontinue | sort-object -property lastwritetime 
$b = $a | where {$_.extension -eq '.log'} |Select  mode, fullname, name, creationtime, lastwritetime,  lastaccesstime, length, extension
$b | out-file -append $fileinfo
$b | foreach ($_.fullname) {get-content -path $_.fullname} | out-file -append $fileinfo 
$ziploc = $env:userprofile + '\desktop\WDOlogs.ZIP'
new-zip $ziploc -verbose:$false -ea:silentlycontinue -force:$true
copy-tozip  $fileinfo $ziploc -verbose:$false -hideprogress:$true
del $fileinfo

EXIT
EXIT

# ***************** NOTE - POWERSHELL VERSION*****************
# if you receive this error msg:
#  Get-WinEvent: The system can not find the path specified
# you need to update your PowerShell
# you must be using Powershell 2.0 or later.
#
# To determine your Powershell version:
#   Run PowerShell
#   enter $host.version
#   you should see at least:
# Major  Minor  Build  Revision
# -----  -----  -----  --------
# 2      0      -1     -1
#
# If you do not see the above, update your Vista/Win 7.
# ************************************************************
# *************** NOTE - EXECUTION POLICY*********************
# If you haven't set the execution policy, you may need to:
#   Run PowerShell
#   enter Set-ExecutionPolicy -executionpolicy remotesigned
#
# ************************************************************ 


He is telling you to run a program that is an offline scan, this is to be sure as all other AV like norton gets loaded after the OS, this scan can check bootsectors as such before the OS loads