When i power on my laptop it stops booting and gives the message Operating System not found. (sometimes - 1 out of 20 attempts it powers on and consequently shuts down after 5 - 10 mins but most times gives this message and wont start at all). What do you think is wrong?
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Starting an IBM Thinkpad T43 in safe mode allows you to troubleshoot technical issues that you otherwise couldn't. Often when a system has a virus or other type of malicious program, safe mode is the only way to locate and delete the problem. In safe mode, only the computer's essential programs are enabled, and only the files necessary to running the system are in use. Learn how to start an IBM Thinkpad T43 in safe mode using a few fairly easy steps.
1.Close all programs and restart the IBM Thinkpad T43.
2.Press "F8" repeatedly after the IBM logo appears, but before the operating system logo appears. If the "F8" key doesn't work, restart the computer and try pressing the "F11" key repeatedly.
3.Press the "down arrow" key to select "Safe Mode."
4.Press the "Enter" key. The computer will boot up in safe mode.
First, you need to check your BIOS to make sure the Hard drive is set as your primary boot drive.
Second, You need to do a complete diagnostic on the hard drive. Many times computers come with a chkdsk option but if not you should be able to make one on a different computer by downloading a disk diagnostic from IBM and putting it onto a bootable CD.
You need to determine if the hard drive is still good before doing anything with the software.
If the hard drive is good try booting into safe mode.
If it still does not load you may need to reinstall the operating system. Depending on the version you can do that without erasing all your files.
You might like to check for virus first by booting with a bootable virus software CD or USB flash drive. If that's it then a lot of headache saved. If no virus then maybe something wrong with your hard drive. You might like to boot with CD or USB flash drive by modifying the boot sequence in BIOS. If you can see the hard drive after booting, then you can backup the data and try a physical media scan on the hard disk. That may fix it if you are given some options. Otherwise you can reinstall the operating system by using the Operating System installation CD or the recovery CD. If Operating System CD is not given, there might be an hidden volume from where you can restore the laptop to factory default. The instruction of doing so should be there on the manual of the laptop. If those are not working, I guess you may need to call the support person of ThinkPad.
Sounds like you have a bad hard drive. Boot up with a Windows CD and select repair at the setup menu. It should dump you to a command line. Type "chkdsk /f" without the quotes and it will check the hard drive for errors. When it's done, reboot normally and it should get you into windows. If it doesn't, replace the hard drive and install windows on the new HDD.