Vista Install Error: IRQL_NOT_LESS_OR_EQUAL
When installing Vista, this error is frequently experienced. Here is what is causing the bug and how to work around this problem.
During the installation of vista, here are two common reported errors that will cause a blue screen of death (BSOD):
IRQL_NOT_LESS_OR_EQUAL
STOP 0×0000000A
By default vista will reboot quickly after a BSOD. If the user had time to notice, usually both of these errors will be on the screen. The computer just reboots so quickly that the user only has time to notice one or the other.
The most common cause of this error is attempting to install Vista in a computer with more than 3 gigs of RAM. This error predictably occurs around the 60-64% mark in “Completing the Upgrade.”
Removing enough memory to get below 3 gigs will allow the installation to continue.
This error may also be caused by a bad or incompatable controller, failing or overclocked memory, or a piece of hardware that Vista does not support. Removing and disconnecting nonessential hardware during install may be helpful.









adi said on October 14, 2008
how to remove memory to get below 3 gigs
BlackRhino said on November 21, 2008
Oh dear god thanks!!!!
Step one was figuring out how to flash read it fast enough to even say what it said…
Patrick said on January 30, 2009
so then once vista is installed you can put over 3gigs back in? it is supported up to 4 gigs, as i believe
JUAN said on January 31, 2009
EN EL PANTALLAZO PUEDO LEER¨, ( BLUE SCREEN) QUE SIGNIFICA.
friend said on March 29, 2009
you are right, but vista x86[32bit] version supports only 3 gigs, so you need a x64 version of vista
Duncan said on February 2, 2011
I have the trouble with xp that i run on my viosta machine less than or not equal ,bsod i bow down to a god sir my many thanks from australia