ComputerChair is an advertising program whose objective is to earn money by generating Web traffic. It usually moved without your knowledge via the download of freeware. For consultation of some sites, like Amazon, it offers coupons on multiple products. It collects information about your navigation habits. It promotes its products (advertisements) and boosted the ranking of sponsored sites. It displays messages of safety on the instability of the system. It slowed down the performance of the system and internet navigation.
Identified 10/13/2015


– It belongs to a family of PUP (Potentially Unwanted Program).
– Vendor : PUP.Optional

Main actions:

– It installs as a process launched at startup of the system (RP),
– It changes the start page of the browser Internet Explorer (R0),
– It changes the browser Internet Explorer (R1) search page,
– It installs a program of extension for browser Mozilla Firefox (M2)
– It installs a plugin for the browser Mozilla Firefox (M3)
– It installs a program of extension for the browser Google Chrome (G2)
– It is installed as a BHO (Browser Helper Object) of internet browser (O2),
– It installs as a service to be launched each time the system (O23),(SS/SR).
– It installs as a (O42) program,
– It creates to many registry keys ‘Software’
– It creates additional folders (O43),
– He moved to the Windows prefetcher (O45) folder.
– It creates multiple files users (O61),
– It creates a Legacy pointing to a malware (O64) service, key in the registry
– It creates registry keys Tracing (O100)
– It creates keys from registry CLSID (O101)

ZHPDiag report:

[MD5.E115D678AE1FB47606AAEE6E8537C8FA] – (…) — C:\Program Files (x86)\Computer Chair\bin\utilComputerChair.exe [464592] [PID.9296] [MD5.353778AA3365EF3A27AE5AF171374280] – (…) — C:\Program Files (x86)\Computer Chair\bin\ComputerChair.PurBrowse64.exe [353488] [PID.11440] [MD5.1D72E1EEC8F0DCB448082D0E21EAEA09] – (…) — C:\Program Files (x86)\Computer Chair\bin\ComputerChair.BrowserAdapter.exe [108240] [PID.9176] [MD5.11CCCA7531CD2DFFA96E4B2E63238796] – (…) — C:\Program Files (x86)\Computer Chair\bin\ComputerChair.BrowserAdapter64.exe [126160] [PID.80] O42 – Logiciel: Computer Chair – (.Computer Chair.) [HKLM] — Computer Chair
HKLM\SOFTWARE\Wow6432Node\Computer Chair
HKLM\SOFTWARE\Computer Chair
HKCU\SOFTWARE\Computer Chair
O43 – CFD: 2015/10/12 18:06:09 – [] D — C:\Program Files (x86)\Computer Chair


PUP.Optional.ComputerChair.A [ Malwarebytes Antimalware ] PUP.Optional.Sambreel [ Malwarebytes Antimalware ] Adware.ComputerChair


– Remove extension of all installed browsers
– Remove the plugin of all installed browsers,
– Remove software in Windows Configuration Panel,
Remove with ZHPcleaner
Diagnose with ZHPDiag

2016-12-30T07:34:22+00:00 Categories: Adware, Polluteware, PUP|Tags: , , |Comments Off on PUP.Optional.ComputerChair