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how do I get into dos mode at boot up (Dell)

Dell Dell dimension e521 desktop compute...
December 10, 2010 at 18:31:13
Specs: Windows Vista, AMD/64 X2 dual core/2gbs.
I'm trying to boot-up in dos mode to fix MBR and fix Boot,I do not have a start up disk,or a win vista install disk. The pc is stuck in a loop-trying to reboot ,I can get into setup using the f2 key,into boot menu using f12 key,and into os menu where it say's "press f8 for more options,so I press f8,pc goes back into boot up loop ovo=er and over.

I am repairing a friend's pc, He's running Win Vista,on a Dell Dimension E521 desktop,amd athlon 64 X2 dual core-2.10 ghz....

All I need is to get into dos mode during boot-up, pc will not boot to windows!

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December 10, 2010 at 19:36:25
You might obtain a Win 98 boot disk with DOS or some other boot disk with DOS and then chang boot sequence on your computer to bootfrom the optical drive and that way you will get a DOS prompt and you might be able to do what you want. A boot disk might be available at

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December 10, 2010 at 20:23:30
Thank You ,I didn't even think about a win98 cd. I've used that method a lot of times, but I did not know I could use it on a vista machine. I will try that with my old dinosaur 98 disk ,because neither win2000 or XP disk have that option,they just seem to want to install fresh with out looking for other OS's to use repair console..thus my need to get into dos. Thanks again, Glennoid

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December 11, 2010 at 00:47:55
You need a Vista CD and use the Recovery Console....

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Related Solutions

December 11, 2010 at 06:06:53
You cannot use a win98 boot disk to reset a VISTA MBR. They are different.

You want MBRFix from the link below:

Command line usage info:
The download link:

Used to repair the Master Boot Record on:
Windows NT, Windows 2000, Windows XP, Windows Server 2003, Windows Vista and Windows PE. Both 32-bit and 64-bit x64 editions are supported

This is for use when you don't have the Windows CD/DVD.

When everything else fails, read the instructions.

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