oxooooo7E error--can't safe mode to correct

Hi, I got this error (in a blue screen) after installing an automatic Windows install...I don't even know what update was installed. I think I have disk space issues, but I can't F8 into safe mode (just keep getting blue screen); I can't restore to good settings (again, blue screen), and I can't access system restore (it too seems disabled). Any suggestions?
full error message is as follows:
0x0000007E
isapnp.sys
address F75E3E4
(oxoooooo5, ox75FE3E4, ox789E528. OxF789E224)
date stamp 480252b8

THANK YOU VERY MUCH!!!

I see you also posted this in another forum here.

If you think it's disk space related, you can pull the hard drive and connect it to another computer and delete files to free up space. You could also boot to the XP install disk and use the Recovery Console to do the same, but it may be a bit trickier.