Infected registry found by MBAM

Hi

W7 Home 64bit - Windows firewall (highest settings) - MSE (real time protection)
Browser: Firefox in safe mode but IE is still on the computer since i use Windows Live Mail.

MBAM found an infection, quick scan, admin rights:
Malware.Trace: Registry value HKEY_current_user_software\Microsoft\currentversion\Policies\Explorer\DisallowCpl|1

I put it in quarantine.

Next day i had some time and restored the infection. Then i ran (quick) scans with MSE, MBAM and SuperAntiSpyware. Nothing found. Also a scan with Hitmanpro 3.5: nothing found. A full registry scan with SuperAS: nothing found.
A renewed scan with MBAM found it again. I put it back into quarantine.

My questions now are:
Is it a false positive?
If not, can i just delete it from quarantine and that's it? Or do i have to look at the registy entries and change/check something there too?
I also did (quick) scans with those AV programs in safe mode while the infection was in quarantine but nothing found in addition.
I am at a loss that MBAM found something that no less than 3 other AV programs did not find.
Thanks.

It may be just alerting you to the setting being set to "1".

DisallowCpl

Jim

Thanks to both of you. I did have a look at the link given (not that i understand it).
It may be something for the Malwarebyte's forum, rather than for this forum.

It may also be connected with CCleaner. I usually fix the registry problems there but once i stored a backup in my documents before fixing and left it there.
It may be wiser not to fix the registry problems found with CCleaner but up to now it has never caused any problems.
Meanwhile i decided to delete the infection from quarantine and get rid of that backup in my documents. Some icons in the start menue are now gone. No problem though.
Point remains why that setting was changed to 1 and how and by whom.
Greetings.

You could edit the registry and change it to "0" which is the default and see if it gets changed again.

Jim