WistaAntivirus (or Wista Antivirus) is a another rogue anti-spyware application that is promoted and installed by trojan. After WistaAntivirus is installed, it starts give to fake warning alerts and force you to purchase the paid version of WistaAntivirus. It will also change your browser settings and redirect your homepage to wistaantivirus.com.
Risk Level : High ( Dangerous )
Note :- To safely & quickly detect WistaAntivirus, We highly recommend you to use the Removal Tool for WistaAntivirus.
Download – Removal Tool for WistaAntivirus
Screenshots:
WistaAntivirus

Symptoms of WistaAntivirus
Pop up balloon warning messages claiming that your PC is infected.
- "Critical System Error",
- "Your computer is infected",
- Hijacked homepage to obscure webpage.
- Flashing icons appear on your system tray (Near of your system clock).
Manual Removal Process: ( How to get rid of WistaAntivirus )
Search and kill the following processes (Learn Here)
wistaantivirus.exe, wasetup.exe, installer[1].exe
Remove WistaAntivirus files & dlls files (Learn Here)
wistaantivirus.exe
realscanner.dll
wasetup.exe
installer[1].exe
Remove/Modify corrupt Registry Entries (Learn Here)
wistaantivirus
Microsoft\Windows\CurrentVersion\Run\wistaantivirus
Microsoft\Windows\CurrentVersion\Uninstall\Wista Antivirus_is1