Recently I have been experiencing an abundance of blue screens relating to ndis.sys and irq not equal message. The BOSD just appears whenever. I don't have to be doing anything specific for it to appear. I don't know what exactly what the problem is or how to repair it without formatting. I do not want to format. I have tried restoring to previous hard drive states with no success at repairing the problem. Upon doing a search of ndis.sys, on google, I discovered that several people have this exact problem with Zone Alarm. I don't have ZA installed, so that eliminates that possiblity. Then I found this site. I don't know if will exactly help find the problem or what. Has anyone ever experienced this problem? If so how did you fix it, without formatting?