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Can't boot to DOS in Win Vista - PC appears to have virus

Windows Vista PC appears to have virus, will not boot. How can I get it to boot to DOS so I can look into the problem?

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  • Bruce Hathcock May 11, 2010

    can you boot to safe mode?

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  • Master
  • 822 Answers

Just get bootable disk. or re-insert your vista cd at startup booting.

Posted on May 24, 2009

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1 Answer

Free antivirus program


You don't have a question here, but I will comment on AVG. I used to use AVG and have Beta Tested both AVG and AVAST. AVAST I can set up a Boot-Time Scan and with AVG I can not. Importance of a Boot-Time Scan, is getting rid of persistent viruses. There is NO, and I mean NO antivirus program that totally works under Windows. The Boot-Time Scan works under DOS and runs before windows is loaded upon your next restart. It takes longer, but it works very well. Depending on the size of your hard drive and the number of files on it, it can take as long as 2 to 2 1/2 hours. It is automatic, so walk away and when you see windows has loaded, then the Boot-Scan has finished. There is a log file that you can view to see what it found if you want to look. Once AVG let a virus into my computer, I went to AVAST and never went back, mainly because AVAST works and also the Boot Scan feature that AVAST has. Years ago, there was a DOS based virus scan that I had used on a Floppy Disc to rid computers of nasty virus attacks and infested PC's. It was proven to me that only a DOS based program can rid any virus a PC is infected with. With the free version you do not necessarily get all the help you need, but with the paid versions you will get all the Bells and Whistles. While free is alright to try, I recommend you Buy! This keeps software development going in the right direction and improvements flourishing.

Sep 04, 2014 | Internet Avg AVG Security V8.0 WIN - 2...

1 Answer

BOOTMGR is missing


This may be due to the reason that your Compaq model is only Vista or Win7 Compatible.I didn't get your question properly but as you're having no windows or DOS in your machine.All you need is a Bootable Windows Disc and a working DVD rom to get this done.Cause commands or anything else will require that and even if you fix it with some tricks. Some Other file missing message may appear. But if you just want to push yourself. Normally are Booting files are in the root folder in my case it's in C:\ like NTLDR BOOT.ini BootSect.dos so try to access your root drive.

Dec 30, 2011 | HP Compaq nc6220 Notebook

1 Answer

Virus/spyware


hi what kind of windows you are running, win xp, win 98, win vista, etc, i will recomend some spy removal as SPYSEEPER you can get it for free for about 30 days, you need it once. go to a friends house and get it from here http://www.webroot.com/En_US/consumer-products.html try to use a cd in stead a floppy nad just installed running windows. an alternative FREE anti virus and anti spyware is avast you can get it here http://files.avast.com/files/latest/avast_home_setup.exe
any of this two apps will run in windows and they will remove the porn ads and will go back to normal.

to use command line MS DOS is a little more conplicated so i will recommend use my links for click by click instructions. good luck

Oct 07, 2009 | Dell Dimension 3000 PC Desktop

2 Answers

Motherboard does not BOOT to windows


If you are running anything from windows XP upwards inc Vista
then you must re-install the operating system when you change the motherboard.

From your description that is the problem you are encountering.

You could place your windows disc in the cd rive and tell the computer to boot from that and try a "repair install"

If successful you will loose no date but will be asked to re-register with microsoft.

If your windows disk is original and not meant for an OEM computer that will not be a problem

Aug 30, 2009 | ASUS P5N7A-VM Motherboard

1 Answer

My laptop not login


hi
ur laptop boot fail....
u reinstall ur Os now
this problem is some new virus effect ur laptop by any pen drive or email....
u format it and load xpsp2 & genuine anti virus load......

Feb 25, 2009 | Microsoft Windows XP Professional for PC

1 Answer

Want to remove Win Vista and install Win XP on two computers


have or can you get a win 95/98 disk...
these disks utilize the dos enviroment...
when you boot with them you can easily get in the dos platform (c://prompt)
once there type in fdisk and follow instructions.
you can also do this from usb ..you need to make usb bootable first.
you may be able to use xp disk and choose repair which will take you to the dos prompt.
you may be able to format hd with vista disk and before it start to install files interrupt it(remove disk)
not advisable though.
if you want program to create bootable usb let me know.
I'll need youre email address to send via attachment.

Jan 25, 2009 | Acer Aspire 3680 Laptop

1 Answer

RESET BIOS COM


1. Boot up your PC with a DOS Boot Disk or WINDOWS boot disc

2. At the DOS PROMPT or WINDOWS DOS PROMPT clear the master boot record with this command.

"fdisk /mbr" without the quotes.

This will remove the boot sector virus

3. Reinstall windows

azkeyz@fixya.com
Wizard Division

Sep 23, 2008 | HP Pavilion Slimline S3123W Desktop PC -...

1 Answer

I cant identify the prolem


It looks like you may have a boot sector virus. A boot sector virus is one that infects the first sector, i.e. the boot sector, of a floppy disk or hard drive. Boot sector viruses can also infect the MBR. All disks and hard drives are divided into small sectors. The first sector is called the boot sector and contains the Master Boot Record (MBR). The MBR contains the information concerning the location of partitions on the drive and reading of the bootable operating system partition.

When disinfecting a boot sector virus, the system should always be booted from a known clean system disk. On a DOS-based PC, a bootable system disk can be created on a clean system running the exact same version of DOS as the infected PC. From a DOS prompt, type:
    SYS C:\ A:\
and press enter. This will copy the system files from the local hard drive (C:\) to the floppy drive (A:\).
If the disk has not been formatted, the use of FORMAT /S will format the disk and transfer the necessary system files. On Windows 3.1x systems, the disk should be created as described above for DOS-based PC's. On Windows 95/98/NT systems, click Start | Settings | Control Panel | Add/Remove Programs and choose the Startup Disk tab. Then click on "Create Disk". Windows 2000 users should insert the Windows 2000 CD-ROM into the CD-ROM drive, click Start | Run and type the name of the drive followed by bootdisk\makeboot a: and then click OK. For example:
    d:\bootdisk\makeboot a:
Follow the screen prompts to finish creating the bootable system disk. In all cases, after the creation of the bootable system disk, the disk should be write protected to avoid infection.

Once the OS loads, run your anti-virus software and it should clean the virus.

Should this not help, I'm afraid the only other alternative would be to reformat the HDD and reinstall XP again from a bootable disc.

Hope that helps..

May 07, 2008 | Computers & Internet

1 Answer

Windows 2000


Probably is some incompatibly of the anti virus software, you can try to uninstall the anti-virus software, if you can uninstall it, try to delete the folder where the anti virus is and restart the machine, you can do that using a dos boot disk or any OS that is in a Live CD, like Bart PE, Ubuntu and etc, the easiest way is to use the Win 98 boot disk, but you have to know some DOS commands.
I you can't do that try to format and reinstall it, but use another anti virus i recommend NOD 32 from eset it's light and work's fine.

Nov 20, 2007 | Microsoft Windows 2000 Professional for PC

5 Answers

Windows explorer


This could be due to a spyware/virus. Have you tried running a virus scan? As you can still get online try an online virus scan: http://www.pandasecurity.com/homeusers/solutions/activescan/ click SCAN PC NOW

Sep 02, 2007 | Acer Aspire E380 ASE380-UD500A PC Desktop

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