Is the physical memory supposed to be almost all cached? Related to freezing up, application crashes and corruption?

Having lots of cached memory in vista is completely normal.

Arg, sorry, IE8 is being a pain.  Continuing...see this question about cached memory.
https://www.experts-exchange.com/questions/23178385/RAM-question-Vista.html

The most likely case of your freezing is either 100% CPU usage, or a failed hard drive.  Since you indicate corruption, the most likely candidate is your hard drive.  That is the slowest part of your computer, if there was something physically wrong with it, it could easily cause your computer to freeze for several minutes while it tired to pull data off the hard drive.

you can try a system restore - if still possibel
maybe a repair install is your next stop : http://vistasupport.mvps.org/windows_vista_repair_options.htm

I tried system restore and it failed to work, My CPU is only at 2% I did 2 harddrive tests from the system bios  and they both passed. If it was my Isp , would my internet connection and being dropped constantly have anything to do with this? Could an electrical problem like a loose nuetral do this kind of thing and not be detected by my battery back up/surgre proptection and a watts-up voltage tester and   still be running and they have not reported any kind of a problem?    I even ran the upgrade advisor and it said I had no problems . Now that I have been off of it for a while it is not freezing up yet but it is typing wierd and when I push the letters they hesitatie for about 20-30 secs? Also my add-ons are all disabled  and I enable them, to go on and when I go back they are disabled again. I will check right now if I am running the IE with out add-ons.. I don't see that I am. So I have to find the reason why this is happening. And it is happening on all of my home computers , all three are Vista Home Premium, and they have all got paid subscriptions to the full Norton internet sec urity 2009 and  I can see no problems there. I know it has to be some software that is doing this to my PC

>>   Could an electrical problem like a loose nuetral do this kind of thing   <<   definitely yes; undetected is more unlikely.

>>  I tried system restore and it failed to work   <<  any errors?   what happened
try in safe mode, if it happens also (hit F8 during boot)

i would test WITHOUT Norton; try uninstalling it, and test with another free AV, like AVG, or AVAST

OK, I will try system restore again but I am wondering more about the elelctrical thing If I had this loose neutral problem last year and I had everything pretty much replaced including a new sub-panel and it took me 6 months to get the electric company to come out and check the meter. Then afterwards I was still having problems and the last electrican said ,that I was suppose to get 3-4 ott copper wire from electric company up to my box. And he told me :"you are only getting 2 ott aluminum from the electric company". They wont answer my request for this infomation.
 Because of that difference, could that be a enough to do corruption on computers and make them crash and not respond? My battery back up keeps messing up and the error is "UPS disconnect,cannot retrieve information"or "Cannot find the specified folder  either the program is not installed or is corrupt. This is a long story and I need to know if this is possible and I dont just have 4 broken PC's with all the same errors, over and over again after restores and recoveries? I have had one PC replaced several times and the same thing keeps happening. The error that I get most is "Internet Explorere has stopped working  or responding and needs to close " Then iin the event viewer it says internet explorer has stopped interacting with windows and needs to close. Once this happens every thing I try to do stops responding or freezes.

i don't know anything about ott wires...
but note that an UPS can go bad also - maybe you can switch with another one ( at another location) to test

OK Now if I have a corrupted registry and I have 6500 errors in the registry scan almost everytime I do a scan, could this also be a reason for all my not respondings?

yes, of course; it seems the OS is corrupt; thebest you can do is save your data, and rebuild from scratch
then, when everything is installed, and data set back, make an image of your disk - if something happens, you just restore the image(after backup of the data), and you are running again in 15'

what i would do first, is test the ram and disk; you can do this from the ubcd : http://www.ultimatebootcd.com/

OK I am on it

OK it pased every test thatI gave it and I know that the OS and all the drivers are corrupted, the thing that i want toknow is why does it keep doing this? It just keeps happening over andover again .I will do a recovery on it myself or I will send it for bench repair and after it happens a few times then HP just sends me a new computer and it does it too. My Sony Vaio laptop does the same thing. If I knew what software was doing this then I could fix ti. Unless it is still an electrical problem that the batery back up is not reporting. And as I said earlier that it was messing up also, It never says it was from a power problem. My cell phone is messed up too and it was just replaced and the battery wont hold a charge for very long and my calls are all disconnected in the first 20 secs and the other person gets a recording saying that the number you are trying to call is no longer in service. Then after they or I call back the call goes fine. The more I try to figure it out it seems to be a power problem . But I paid over 15,000 to get everything replaced last year so if I am getting bad electricity iit has to be from the power company and they wont admit the problem after last year when I finally got them out here to check and it was a loose neutral but they said it was on my side of the box and they weren't responsible for it . Now when I call the manager back about my onging problems he won't even accecpt my phone calls. There was a mix up and there calim damage dept started to pay me and then they called and asked for the money back that they had sent me. I dont really care about the spent money but I do want to have the right ammount of voltage coming into my house. I have already had dedicated lines installed and battery backup with surge control. So wjhy wont one of them at least show some kiind of an error> I get a little pop up every once in a while that says "UPS disconnect cannot read data from the UPS" Belkin just wants me to reinstall the software again. I have done this so many times , I and the system just goes corrupt again. It has to be the power unless you can think of anything else. All my PC's are running Vista home premium

from your store (cell phone too) i would rather suspect strong radiation, or electromagnetic fields in your environment, or a poor ground - was that checked too?
When you use the laptop in another house, or city; did you notice these problems?
otherwise, it should be attriburted to coincidence, and that is just hard to believe...

   I have tested it for magnets. HP had me take a compass and walk around the house and see if it went crazy. It didn't . But I have never heard of radiation. How do I test for it? For the laptop I haven't really gotten to use it outside this house. I will now be able to go somewhere and try it. And that is the whole reason that i got the laotop, it was to see if I ran it wireless and on the batterey, then I would be able to determine whether or not it was electrical. It did get the same things going on . So then I tried to see if it could be somthing to do with the ISP. I get plenty of errors from that thing also. I get alot events in my event viewer telling me that my IP address has not been renewed, then I gert some that say my IP address has been denied. Most of my errors are about the fiolders could not be found. Either they are corrupted or not installed. The keyboard hesitates alot just like when it was surge. But nothing else is giving me any indication that it is the power. Tell me how to test for the radiation and I will try it . There are no coincedences here somehting is really wrong with the power or I have a curse on me . test                                                                              

electromagnetic radiation is caused by transmitters, or strong electrifity users.
radiation is measured with field strength meters (just ggogle that)
BUT you can also do the opposite : shield it !
to do so, you have to build a FARADAY cage (you can do it with copper wire, or alu foil, out of which you make a box; if possible, connect it to ground. (google that too for info)
you can even buy it :  
http://www.unitedstatesaction.com/emp_and_faraday_cages.htm
test your laptops and pc's one by 1 in it.

OK I googled it,but I just dont have the time or the money to build this faraday cage. I should ask what makes you think I have electricomagnetic radiation running through my neighborhood? Why would I have something like this and no one else. Wouldn't everyone in the whole area be getting the same problems? I am  not quite sure if this would be the problem because the article says that it will wreak everything, not just corrupt it. Am I wrong?  What other reason could the OS and drivers keep going corrupt on me rather than this problem ? If I sent the dump files would it help? Any kind of errors or info that I could send for you to reach a decrsion? I am just wondering that if it was something like a hacker ? This problem has been going on for almost 2 years

>>   the money to build this faraday cage.    <<  ???   costs next to nothing, make a wooden cube that can contain your pc, or laptop, and cover it with alu-paper, connect it to ground.
i never said YOU have radiation; only that it can be, since (from your post) you said AC supply is checked and fine, so it must be something else.
Well; there is not much left then...

i even had a question here of SOMEBODY  ruining the OS, and PC's everywhere he came in, and touched them...
so -  ghosts is another option if you like..

but what it comes down to in such cases, is check each possibility, as well as possible, then proceed to the next.
eventually we'll find the cause then

I hate to come back with the same answer, but i'm still not convinced this isn't a hard drive issue.  Main memory could be the problem as well.

To rule out the hard drive, download, burn and boot this tool from hitachi, as a tool it's very bad at detecting if your hard drive is still good (meaning if it comes back with no problems that doesn't tell you anything) but it's very good at finding problems, meaning if it finds a problem, your drive is broken for sure.
http://www.hitachigst.com/hdd/support/downloads/dft32_v414_b00.iso

This is a good tool for testing problems with main memory.
http://www.memtest86.com/memtest86-3.4a.iso.zip
Download it, burn it and boot it.

If you need any assistance about how to use these tools, just ask, or check the respective websites for documentation.

OK I am doing this now will get back aas soon as I get the results, thank you

The tests said they found no problems . But what if I was having a power problem and didn't know it? Like last year when I had the loose neutral. The lights never even flickered. But  all of the PC's are doing the same thing. It will just stop and freeze up whenever and if I am typing it will just stop and then start right back up but it looks like you misspelled alot of the words So I wewnt out and checked the box and hte lines are all intact and look perfect. But the last electrician that was here said that I had copper wire and the elecric company was only using aluminum wire . Would that be somehting that would impact on my computer? I am now crashing daily it seems and when I am downloading software I get this new error that i never got before: The download was interrupted and failed please try and reinstalling the app again" This would indicate some kind of a power problem would'nt you think so ? I am also getting errors from Yahoo mail that my last lsession was closed unexpectedly, do I want to resume or open  new? I see errors in my event viewer that say "The last shutdown was unexpected unsigned kernel modules, and it just stops responding every 2 min. I loose alot of stuff because of this but it seems like it is getting worse. so how am I suppose to be getting my voltage from Electric company?

>>  But what if I was having a power problem and didn't know it   <<  that can be; however you posted that that was taken care of; so i did not take it into account.

you can use an ups (if you don't already) :http://www.smps.us/uninterruptible-power-supply.html
in your case, the double conversion type would be needed

or a generator

I have a UPS and it is going off all the time and I called the company and told them that when I come home it has turned off and it is beeping. This happens about once a week. And the software wont work in it anymore. I have installed and reinstalled it and I am afraid that the power problem could be back , but I have a voltage tester right next to my desk here and it never says that I am going over 120 volts or under 118 volts. I went down to my gate and looked at the box again and there was no looses neutral. But I did see what the electrican was talking about when he said I was only getting 2 ott aluminum wire from the electric company. It is right there you can see where my copper wire is and it is alot thicker that from the electric company. Is there someway you get your power wrong but the right voltage? Idon't remember exactly what the electrician said to me about what it would do but it must be something because he said that it is suppose to be 3-4 ott (I am guessing this means the thickness) copper wire. And I have this thin aluminum stuff and then it comes out to my part where it is the copper wire. The error that I was getting from my UPS was "UPS disconnect cannot retrieve information." I will send some of the errors I have for just one day.
event-viewer-errors.txt
event-viewer-errors-2.txt
event-viewer-errors-4.txt
event-viewer-errors-5.txt
event-viewer-errors-6.txt
event-viewer-errors-7.txt
event-viewer-errors-8txt.txt
Iaant-mon-error.txt
registry.txt

if your AC is not stable, you do not need to look for PC errors - it has to be fixed first.
you say you have an ups, but how long can it hold power? what type is it? single, or double conversion, etc...
you have to look at these points

I don't know what a single or double conversion is , but this is what mine is:
Belkin Battery Backup 1500VA 830 watts
8 outlets with surge protection and battery backup
AVR for clean even power
easy fast,USB/serial/ethernet plug and play set-up
network manageable SNMP capibable
Dual form factor tower or horizontal
Up to 120 minutes of back up time
$200,000 connected equipment warranty
3 year product warranty
Data recovery warranty
For high end computers and office equipment
under voltage transfer to battery

How do I know what a single or double conversion is? It doesn't say anything about it on the box. It does say that I can use up to 3 PC's at a time   But I thought  that if I bought the best one that they ahd to offer I would not have to worry about anything not having enough power.
But I have been getting a rundll32 Host process keeps popping up and saying that it stopped working. It has done this 7 times in the last few days  I don't get many errors on my screen so If I get one I think it is pretty bad. My computer  usually just doesn't do anything ,or give me errors on screen, I have to go to the event viewer to find out what happened. Half of the time I don't even know when I got the blue screen and crashed. It will just do nothing when I click on a program  or file. that is when I have to go look and see all the things that the computer can't find . And it says they are either not installed or corrupted. This is what I have to fo through 10 times a day..
 So I have narrowed it down toit is a power problem or it is my ISP and they say that no way it could be them.

such nice words remind me why i do this. thanks Suzanne !