Windows 10: runas command won't recognize administrator password

I tried the runas command to configure some software I just updated, as the directions said, but my administrator password was rejected. Then I tested the runas command on a pdf file that I know for sure is in the current directory (it can open from the command line), but my administrator password is still rejected.

Settings > Accounts says:

Seka
Local Account
Administrator

And I'm able to confirm my current password and change it (I change it to the same password). But here's the problem:
C:\Users\Seka\Desktop>runas /u:administrator Lightworks_v12.5.0_User_Guide.pdf
Enter the password for administrator:
Attempting to start Lightworks_v12.5.0_User_Guide.pdf as user "SEKA-PC\administrator" ...
RUNAS ERROR: Unable to run - Lightworks_v12.5.0_User_Guide.pdf
1326: The user name or password is incorrect.
C:\Users\Seka\Desktop>

Any tips? Ways to confirm my password works or that I'm the administrator or anything? It's too late for me to go back to Windows 7.

EDIT: I was surprised with a log on screen when I turned my computer on this morning. I had to enter my password. It worked though.

:)

 

force refresh (sync) of Microsoft account password cache using Remote desktop after the password is changed from somewhere else

I never understand why the Microsoft Support Engineers even bother to reply to these questions. I have never seen them come up with a useful answer to a technical question. But after thinking about it for at least 5 minutes, I came up with a work-around

Om my remote machine I have two accounts: I have a local administrator account and I have the MicrosoftAccount as a standard user.

To re-sync the password: logon with the local administrator account, I open the command prompt and type:

runas /u:MicrosoftAccount\[my account] cmd.exe

or

runas /u:[my account]@outlook.com cmd.exe

replacing [my account] with the actual account name of the Microsoft Account

This will force the machine to resync the password so when you get prompted you can type the most recent password. As from that point on, RDP will recognize your new password.

I also tried the above commands while being logged on as the standard user. It looks like you can do the "runas" command for the current user, so you might not even need to use another account.

Hopefully above procedure contains enough clues so that someone can figure out what is happening and come up with a real solution

 

Can't find file "C:/WINDOWS/system32/taskmgr.exe",but taskmgr.exe is overthere...

>> I can't start any .exe as administrator,once I do that,the program won't start and this annoying error messagebox appeared again...

Open Control Panel, User Accounts and create a standard/limited user account (to test). After creating the user account, open Command Prompt and type:

runas /noprofile /user:newusername c:\windows\system32\taskmgr.exe

Replace newusername with the actual standard user name you created. It prompts for password.. Type it.

(If Task Manager starts fine when run under standard user account credentials, but not in an administrator account, next place we need to check is the registry.)

Edit: Assign a password for the newly created account, otherwise runas might throw an error.