Now sorry but this will repeat some of my post above but have no idea of any other way to post all this;

Lady had been having "blue screens" for several months...of course right AFTER warranty ran out. Running Vista, AVG 7.5 antivirus, AVG anti spyware, Spybot SD, SpywareBlaster, Win. Defender/firewall.
I.E. 7 dial up. She added 1GB of RAM thinking maybe not enough RAM was the cause. Blue screens generally happened when waiting for a photo to come up on photo page. Occasionally while original Norton anti-virus was updating. She remove Norton knowing it is a resource hog and installed AVG Free.
Had her run as many steps of PP's sticky as she could...online scans would cause the "blue screen" however so we stopped that. Ran all of her anti-spy programs, her AVG program, and then an HJT scan...all done off-line without difficulty which should have given me a clue...I am dense and didn't figure that out THEN. Really nothing showed anything, except out of date Java. Uninstalled old version, installed new version and computer seemed ok for couple days and then again blue screen. Had her do checkdisk/fix, nothing changed and only a couple fixes needed. Blue screens continued...WHEN ONLINE only...still didn't catch on! In fact she didn't mention it either. No message on the screen however, it would show screen and then reboot. Had her disable auto reboot during blue screen but it still did not display any message. Also had her update video card. Still had the same difficulties. Finally had her use Event Viewer and give me errors showing before or during time of blue screens. They all were pretty much what is shown below.

Source: IPRIP
IPRIP was unable to add a route to the system route table.

Source: Tcpip
TCP/IP failed to establish an outgoing connection because the selected local endpoint was recently used to connect to the same remote endpoint.
She ran the Dell Diagnostic Tool
Dell Diagnostic Tool Info
Microsoft ISATAP Adapter, is reporting "tv_ConfigMgrErr31
Microsoft 6to4 Adapter, is reporting "tv_ConfigMgrErr31
Teredo Tunneling Pseudo Interface error, though can't find now what the wording of the error was...I have "tons" of saved files on this problem!

Then had her go to Device Manager and these items all showed errors;

Network adapters: shown are SIX , 6TO4 Adapter listings.
isatap, (FB4F3505-C1CB-4F2E-8604-90D580B8BAE3} , shown 5 times..
The isatap when right clicked says, 'this device is not working properly because Windows cannot load the drivers required for this service.
It is enabled.

6TO4 right click says same as above, enabled...not working properly etc.
Teredo Tunneling Pseudo Interface enabled...not working properly.

She then ran the Vista Reliability and Performance Diagnostic check
The basic system checks showed "passed"........with the exception of Hardware Device and Driver Checks, which 'failed'
Microsoft ISATAP Adapter, is reporting "tv_ConfigMgrErr31
Microsoft 6to4 Adapter, is reporting "tv_ConfigMgrErr31
Teredo Tunneling Pseudo Interface failed

First site I found said that the excessive number of 6TO4 Adapters and ISATAP Adapters were due to the fact that the devices were not working properly so with each reboot the system would try to install a new one. All those showing errors (there would always be at least one NOT showing an error) should be removed, which she did. BUT with each reboot a new one would be added...because of course they were not working properly. Finally on the site which gave me the solution the first step was to Uninstall those with errors but NOT reboot but THEN disable those without errors and THEN reboot. These were the ones I had her disable;
Microsoft ISATAP Adapter
Microsoft 6to4 Adapter,
Teredo Tunneling Pseudo Interface
NONE of these are needed with dial-up. Those using dial-up and Vista seemed to be the ones having the problems.
After disabling all, she rebooted and no more blue screens.I finally found the solution by searching for those exact errors. Even that took awhile, blue screen problem for Vista was listed on countless websites but no solutions. Then I began searching using terms, Vista, Blue Screens, dial-up and adding one of those items above. Soon found answer on about three sites, all led to one link but now for the life of me I cannot find it, but on all of the three other sites the poster reported success using fix given.

I would suggest somebody on dial-up experiencing the same problems first of course be sure the computer is clean of viruses, malware, etc.
But THEN check the Device Manager for those three devices showing a problem. Uninstall the extras which will show the Yellow Exclamation point indicating a problem. THEN disable those devices and she also disabled NIC card since she is using dial-up.
So far so good. We are keeping our fingers crossed that this will be the final solution.