Problem with Windows vista Home Os

Can you boot into Safe mode with Networking, then if needed download anti-virus and anti-malware programs to run?  This could be a problem with viruses/trojans/spyware or other malware. Some free online virus scanners:

http://housecall.antivirus.com 

http://www.pcpitstop.com/antivirus/default.asp 

http://www.pandasoftware.com/activescan/com/activescan_principal.htm 

Also try these free programs to rid your system of spyware, trojans, and other malware:

http://www.superantispyware.com/
SuperAntiSpyware

http://www.download.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572.html?tag=nl.e415
Malwarebytes' Anti-Malware 1.30

If no malware is detected, but everything runs OK in safe mode, then it may be because of some conflict caused by startup programs (which do not run in Safe mode) or some driver that is not used in safe mode.  In Windows 98/ME/XP/Vista/Windows 7, you can choose which programs are run at startup by using the Microsoft Configuration utility:  click on the Start button, choose Run, type in MSCONFIG (doesn't need to be all capitals), click OK.  Choose the Startup tab, deselect programs to run at startup by removing the check mark.  In Windows 9x/ME, you may need to disable just about everything except Explorer, ScanRegistry and SysTray.  In Windows XP/Vista/Windows 7, just click on the button for Disable All. Reboot and see if the problem goes away.  If it does then re-enable the startup programs one (or a few) at a time, reboot, and when the problem occurs again, there is your culprit.  If you have a great number of apps to narrow down on in trying to track down the culprit, do it instead by dividing up the loading programs into successively smaller halves:  disable half of them; if the problem doesn't go away, then the offending app is within the other half, so divide that group into half; or if the problem does go away, then the disabled group contains the offender, so again narrow down by dividing in half.  

In Windows XP/Vista/Windows 7: If the problem continues to come up with all startup programs disabled, then it is probably a driver or service.  You can click on the Services tab in MSCONFIG, click on the button for Hide All Microsoft Services, leaving only third-party services displayed, then try turning them off in the same way you did for startup programs.  Finally, if third-party services are eliminated from being the cause of the problem, you could try narrowing down on Microsoft services in the same way.

Thank you for your suggestions, i will try and let u know

Hi ,

I tried the above two options but no luck, so as the last option I have is re-install vista / recovery which will delete all softwares installed in my laptop.

Any other clues??

What happened with the check for malware and the use of MSCONFIG?

Hi ,

I tried the above two options malware checing and use of MSCONFIG, but no use, still I got same screen
black screen with mouse pointer.

At last I have used recovery option.

Thank you all for your valuable suggestions

I know  to reinstall vista , if  the options suggested by experts did not  work.