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One of the start-up programs or operating system file may be corrupted causing the unit not to load the os. Here's what you can try to see, one might work for you.
- Go to BIOS setup and reload default settings. Make sure that no other storage devices are plugged in to the unit.
- Boot to Safe Mode. Disable start-up items and disable non-Microsoft services. Try to boot if it works. If not, proceed to the next step.
- Boot to Safe Mode and perform a system restore back to the date it was working fine.
- You may need to reinstall the os if none of the above options work.
Try to boot in safemode. Turn off the laptop and keep tapping F8 upon turning ON, the advance boot option will come out. Select the Safemode option just the regular one. Wait until loaded on safemode. Try to back up your files under safemode. Your laptop is already infected with virus and the OS is starting to get corrupted. After backing up the files...you need to do the system recovery to completely delete the virus. The recovery instruction is on the disc case so follow steps. In case you don't know here's the instruction. Insert disc 1 and shutdown the laptop, hold C upon turning ON, let go of C when Toshiba screen comes out, always select the first option, like to select Toshiba recovery wizard. You don't really have to change anything because it's all set to defaults, all you need is to hit next all the time...when you see, "initializing the partition please wait" then that is the start.
since it can boot to bios setting, then have you try configuring the boot order,the cd drive should come first,after that your hard disc, if the hard drive comes before the cd rom then it would not recognise it.
Change the settings and Save this settings, then try to boot from the cd again, if this does not work then i am rest assured that your hard drive has a problem,and you need to find solution to it by getting a new one.
From the symptoms, the computer Operating system seems to be corrupted.Try to follow the steps
Try booting to BIOS by punching DELETE / F2 key on startup.Then press F9 key, load the defaults.After that press the F10 key to save them and then start tapping the F8 key to get the repair my computer options.Select safemode .If the computer is booting to safemode, you can try doing a system restore.If the unit is not booting to safemode, then the Operating system has to be reloaded.
Get a bootable disk, like one of the newer Norton Antivirus/Ghost/InternetSecurity cd or dvds. You could also get a BartPE disk from a friend. This way you can check for errors on your hard drive without removing it from the computer. If there are no errors, you might have some sort of virus that has corrupted a windows driver or your boot sector.
Try going to the bios and reset the bios to load factory defaults and then reboot. If the same thing happens try taking the hard drive out and reboot, if the same thing happens again its not your hardrive because it would say no boot disk after post. Iam guesing it may be a bios fault because after the logo it goes blank not while loading the os(operating system).
if you can get into safemode
click start then run
in general tab click normal startup mode load all drivers etc.
then click okay or apply
restart and then if a box appears click do not show again
hope this helps if not let me know