Error Message 0X80070005 (access denied)

I am using Dim 4600 Series Intel Pen 4  Win XP SP2

Whenever I try to go into my documents/settings.. I get the error message 0X80070005  access denied. I am logged on as (my name/Administrator) but it doesn't matter. I have been trying to fix this for as long as I can remember. Troubleshooting , asking for help on forums about not being able to schedule tasks. I have followed the directions to the letter on entering the scheduled tasks and set my password.  I also have my computer set up where I  enter a password when I sign in. when my computer starts up I will get a notice TASK SCHEDULER SERVICE NOT RUNNING...SOME TASKS DID NOT EXECUTE, GO TO SCHEDULE FOLDER, ETC.. Which I have done over and over, to no avail.  Not being able to schedule tasks is bad enough BUT my main concern is the  ACCESS DENIED ON MY DOCUMENTS/SETTINGS.

 

 Another example: I was going to send an email to Microsoft to see if I could get  support..I signed in w/my  Windows live ID and correct password, I had to enter my ID # for my Product, so i clicked onto the site where it shows you how to FIND my Product ID and got this mess: YOU ARE NOT AUTHORIZED TO USE THIS PAGE. HTTP ERROR 403-FORBIDDEN  Internet Explorer.

 

For the life of me I can not understand what is going on. It's like I'm not the owner/administrator. and the last several times I have tried to go into SAFE MODE (have asked for help from Comm Forum w/this also and trouble shooted) It comes up on the screen distorted and I can't do anything , it just freezes and at times I can not get out of that frozen screen w/the HUGE icons and no task bar. I finally found a way to get the task bar to come up, I go to start/Run/ msconfig/ ...get the menu and it don't show that I am even IN the safe mode. UGH  !!    I think this ALL must be related to the fact that I am denied access to my settings. Can anyone  PLEASE help me. This is just about to drive me crazy.  :smileysad:   Please make instructions clear, I am not an ol' pro at this.  lol  Thanks

Retired Nana