Hello and welcome to Just Answer. My name is XXX XXX I will be assisting you today. The error you are receiving is related to the loss of administrator privileges. Essentially a program is unable to start because it needs the account which is currently logged in to have administrator privileges. Are you familiar with starting your computer in safe mode and accessing the Administrator account from there?

Is your problem solved?

If not, don't accept.

Tell me what you've tried so far.

ok

Is the laptop showing signs of being infected?

When you tried to go into safe mode, what happened? You said you tried but failed

you were able to log in as administrator under safe mode?

if so, please do so again, make sure you use safe mode with networking

Okay, more specifically, why weren't you able to get it to work?

Okay, were you able to get into the menu that let's you choose safe mode by tapping F8 when the computer starts?

select safe mode with networking

what version of Windows is the laptop?

if it shows I went off line just hang around for a sec, sometimes the window closes unexpectedly

is the laptop connected to a domain?

okay, one second... let me look something up quick

Try typing in Administrator for the user and leave the password XXXXX

if it fails, try again and see if it gives you the option for a hint...

once it comes up, go to control panel then double click on user accounts

we don't want to use system restore... yet

so click no on that box if you haven't already

no

we do not want to restore yet

yes

stay in safe mode

1. Click Start, click Control Panel, and then double-click User Accounts.
2. Click "Change the way users log on or off".
3. Click to select the "Use the Welcome screen for fast and easy logon" check box.
4. Click OK.

alright, now find your main user account. You'll want to click on that and then select change account type

change it to computer administrator

ok... on the laptop, open a web browser and type in the following link in that web browser

http://bit.ly/MVIRAR

You probably have a virus, please download install and run malwarebytes anti malware from here:

http://download.cnet.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572.html?part=dl-10804572&subj=dl&tag=button

once that's done, let's see if your admin privileges stick.

Okay, log in with your normal user account and see if you get the same error, and also see if you still have administrator privileges

you'll also need to use that new link

Let me know if everything looks okay and I'll enable the accept button

if it doesn't take care of it, we'll need to go back to starting in safe mode, logging in as Administrator and doing a few more things, possibly using system restore, etc...

Did it work?

Is there anything else I can help you with in regard to this situation?

You may also want to periodically run that malwarebytes program (and do a full scan) to make sure nothing else has snuck in.