PC crashes regular - help to read the minidump files

I am trying to help out my fathers pc, who crashes couple of times a day. I have tried during one week all trics to my knowledge, but nothing seems to help. I now tried to read the minidump files, but I can't get anything out of them. Is there anyone who can understand what the problem could be, you would enormously help my father and myself by saving lots of time. Thanks a million in advance.
I attached 4 of the minidump files, we do have more of them if it could help.

Drivers update required:

Printer:

Disconnect your printer.
Download and run this patch: http://support.dell.com/support/downloads/download.aspx?c=us&l=en&s=gen&releaseid=R166239&SystemID=PRN_ALL_A922&servicetag=&os=WLH&osl=en&deviceid=6785&devlib=0&typecnt=0&vercnt=1&catid=-1&impid=-1&formatcnt=2&libid=40&fileid=224497

Restart.

Download XP Drivers here: http://support.dell.com/support/downloads/download.aspx?c=us&l=en&s=gen&releaseid=R102523&SystemID=PRN_ALL_A922&servicetag=&os=WW1&osl=en&deviceid=6785&devlib=0&typecnt=0&vercnt=2&catid=-1&impid=-1&formatcnt=1&libid=40&fileid=132493


Computer:

Then go here: http://www.techspot.com/vb/topic100658.html
And update your drivers, especially: S3 Graphics and Network drivers

Thanks for the answer, did all of that but still no help, the pc seems to crash immediately after startup and does this a couple of times, once he is up and running for a while, he seem to remain stable.
This morning as well, we could note the following message at the crash
0X00000019 (0X00000020, 0XE1015CAO, 0XE1015CDO, 0XOC060402 )

Anyone who would have any idea, thanks in advance.

That error can mean hardware or software, and there are many reported fixes that worked for some and not others
I'm going to state the most obvious one and that is your physical Ram cards
Remove the internal Ram card(s) blow out all/any dust
Reseat the Ram cards (until they click back in)
Then try starting up again

If you still have further issues, I'd suggest to run a Memtest scan (some users leave Memtest scanning overnight, which is a good idea)
> Here's the Guide (http://www.techspot.com/vb/post653029-21.html)to set you up with getting Memtest to start

EDIT

Actually run > CheckDisk (http://www.techspot.com/vb/post672297-2.html) as well ;)