Hello there jemma heres the way to remove the bug off your computer just folllow the steps i have here for you ok.
How to remove sshnas.dll or sshnas21.dll trojan (Remove trojan FakeAlert)
sshnas.dll or sshnas21.dll is a component of trojan FakeAlert. The trojan come from malicious websites that ask users to download an Adobe Flash Player update or player needed to view a movie online. The filename of the trojan is flash-HQ-plugin. Once started, the trojan will download and install core components: c.exe, msa.exe and sshnas.dll (sshnas21.dll). When downloaded, it will be configured to start automatically when Windows starts. Trojan FakeAlert may display many popups and fake security alerts, hijack Internet Explorer, disable Windows Task Manager and Registry editor.Also it is usually installed in conjunction with a rogue antispyware programs.
If your computer is infected, then use these removal instructions below, which will remove sshnas.dll (sshnas21.dll) trojan and other components of trojan FakeAlert for free.
Double-click on the icon on your desktop named mbam-setup.exe. This will start the installation of MalwareBytes Anti-malware onto your computer. When the installation begins, keep following the prompts in order to continue with the installation process. Do not make any changes to default settings and when the program has finished installing, make sure a checkmark is placed next to "Update Malwarebytes' Anti-Malware" and Launch "Malwarebytes' Anti-Malware". Then click Finish.
MalwareBytes Anti-malware will now automatically start and you will see a message stating that you should update the program before performing a scan. If an update is found, it will download and install the latest version.
As MalwareBytes Anti-malware will automatically update itself after the install, you can press the OK button to close that box and you will now be at the main menu. You will see window similar to the one below.
Malwarebytes Anti-Malware Window
Make sure the "Perform quick scan" option is selected and then click on the Scan button to start scanning your computer. This procedure can take some time, so please be patient.
When the scan is finished a message box will appear that it has completed scanning successfully. Click OK. Now click "Show Results". You will see a list of infected items similar as shown below.
Note: list of infected items may be different than what is shown in the image below.
Malwarebytes Anti-malware, list of infected items
Make sure all entries have a checkmark at their far left and click "Remove Selected" button. MalwareBytes Anti-malware will now remove all of associated Trojan FakeAlert files and registry keys and add them to the programs' quarantine. When MalwareBytes Anti-malware has finished removing the infection, a log will open in Notepad and you may be prompted to Restart.