Each time I try to clean up my (Chrome) browser I get a message: unknown error, could not perform. I did a deepscan, that did remove some stuff but still get the errormessage…
They are loking into this issue: https://forum.avast.com/index.php?topic=162322.0
Anyways managera is a hijacker so if I were you I would be looking for help in the V&W forums to check out your system.
Follow this guide: http://forum.avast.com/index.php?topic=53253.0
Open a new topic and attach ( Do not copy/paste ) logs for Malwarebytes’, Farbar Recovery Scan Tool, and aswMBR.exe here:
http://forum.avast.com/index.php?board=4.0
Where an expert in the removal of malware will help you.