Admin account problem

[Philthy]

my computer has changed my account setting from Admin to Guest (never has this happened before)
the only think i changed yesterday was add a login password at startup
i have spent the last few hours trying to resolve this issue but have had no luck
i carnt change any programs, and i carnt access command prompt in admin mode
please help

 

[Trouble]

Hello and welcome to the forum.
You might be able to rescue your computer by enabling the normally hidden / disabled Administrator account and use that to possibly fix the password problem on your local user account.
You'll need to boot from the installation media. If you do not have the installation media on hand you can download the ISO from here
https://www.microsoft.com/en-us/software-download/techbench
Choose Windows 10, the first item in the first drop down (not single language at the bottom)
Next choose your language and your bit version (32 or 64 bit to match your system architecture or in the case of an upgrade, to match your currently installed version of Windows).
That will provide an ISO that will upgrade, repair (or clean install) either or both Windows 10 Pro and Home.
Once you have downloaded the ISO you can use ImgBurn to burn it to a DVD http://imgburn.com/index.php?act=download
OR
Rufus to burn it to a USB ThumbDrive http://rufus.akeo.ie/

When you've managed to boot from the installation media you should be able to follow the example given in this article here.....
http://pureinfotech.com/2015/11/20/how-reset-windows-10-forgotten-password-regain-access-computer/
Once you can boot from the Administrator account, you should be able to fix your user account issue.

 

[Philthy]

thanxs for the reply
its not the password that is the problem
its like my computer has locked me out (if that makes sense) im able to login and access all my files and most of the programs on the computer (eg. it wont open PEER BLOCK, i get the user account control pop up box but i carnt click the yes button)
all i did was enable password through "NETPLWIZ" ((which i carnt access anymore)
i also canrt add another user account as i don't have that option in the Accounts windows
I also tried to repair windows but i can mount the iso with POWER ISO but can not open the drive once it is mounted

 

[Trouble]

my computer has changed my account setting from Admin to Guest

So no.... it isn't the password that is the problem it is the account associated with that password that is no longer (for some unknown reason) a member of the local administrators group and without that and without another account on the system that is a member of the local administrators group, the only way I know of to fix that, short of purchasing one of the many third party software products that may or may not actually work on your computer or in the case of a microsoft account might not actually fix it, is to enable the hidden administrator account as I suggested above.
There are a number of ways of doing it, but.... the link I provided above, I've used and know it to actually work. And the step by step guide is pretty straight forward and explains what to do, how to do it and how to undo it when you're finished.