admin password changing on its own for server 2003

[wirelessguy]

I have a customer that has server 2003 32 bit. This started about 1.5 year ago when suddenly the administrator password would not work. I use a cd that i boot from and reset the password. I then change the password to something new and give it to them. At that time I also made another admin account so I would always have access at any time. The administrator password will change and the admin account I made with default back to a standard users account. I can go back out and reset everything, change password and change the other account to have admin rights, but in a week or two it will change again and they will not be able to log onto the administrator account. I have changed policies that passwords never expire. Any advice would be appreciated.

thanks

[Steve R Jones]

Scan for malware is about the only thing that comes to mind.

[wirelessguy]

I have scanned many times using anything from symantec products, malware bytes, spyware dr..you name it..never finds anything. There are 5 users that remote in to the server, but they all have limited accounts.