How to check for a virus on a remote machine?

Using a Win7Pro machine remotely, today a popup said "Unable to launch application" and the popup window did not look like anything from Microsoft or anything real. It looked hoakey and virus-like, so I launched Task Manager and used the "End Task" button to stop it.

Is there a good app I can download remotely to check for viruses, or, what is good way to figure out what that was?
wfcrrAsked:
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FOXConnect With a Mentor Active Directory/Exchange EngineerCommented:
Go to www.malwarebytes.org download install and run
Also download jrt removal tool (junk removal tool) and run (bleepingcomputer.com)
download and run Adwcleaner as well (bleepingcomputer.com)
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KimputerCommented:
Most nasty virusses are active when Windows starts. Those can only be removed when booting from a special CD (available for almost ALL virus vendors). Using only remote control is usually a sure way to keep the virus happy.
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rindiConnect With a Mentor Commented:
Just run the AV tool that you already have on that PC. Make sure it's definitions are up-to-date. If that comes out clean, run malwarebytes as has already been mentioned. Malwarebytes is most efficient when run in normal mode, as the malware needs to be active for it to find it, so it is not recommended to boot into safe mode.
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wfcrrAuthor Commented:
Cool. I ran Malwarebytes and it found an Adware thing it called a Malware and 8 other suspicious things, removed them and I rebooted.  What should I do now?
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FOXActive Directory/Exchange EngineerCommented:
Run Adwcleaner as well.  It may find rogue programs in task scheduler.
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rindiCommented:
Run malwarebytes again just to be sure.
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wfcrrAuthor Commented:
Two questions: I ran malwarebytes and it found nothing, but, I wonder if I need to uninstall and reinstall? I have heard viruses can sometimes alter the database a scanner uses and thereby fool it.?  

Second question, which Adware should I download and run?
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FOXActive Directory/Exchange EngineerCommented:
download Adwcleaner and JRT from bleepingcomputer and run those
You are good with the malwarebytes no need to uninstall and reinstall that again.  Remove anything it has in its quarantine and you can uninstall malwarebytes.
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wfcrrAuthor Commented:
Ok, running Adwcleaner now...and will run JRT after that.

Regarding Malwarebytes, how do I "remove anything in it's quarantine"?
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FOXActive Directory/Exchange EngineerCommented:
There is a tab that I believe says quarantine.  Highlight the tab, give it a few seconds to populate anything that may have been quarantined then there is a button to delete all
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wfcrrAuthor Commented:
I deleted all quarantined stuff in Malwarebytes
I ran Adwclean and it found stuff and I had it remove the stuff...then rebooted.
I ran JRT and it found nothing.
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