Can someone help me get this virus off my computer?

[sh_el_ca]

I turned on my computer this morning and it opened up Chrome (my default) and started opening Facebook in multiple tabs. It wouldn't stop, and it even opened up more windows and opening Facebook.
I deleted everything that I downloaded yesterday (two things) but it wouldn't stop. But then I opened Chrome myself to go here, and it opened two tabs of Facebook, then stopped when I loaded Yahoo. It probably has my password now, but I need to get this virus off my computer, unless it disappeared suddenly.

[Aiden Juis]

I would suggest download anti-malwarebytes.
That free program can remove the virus.
After it removes it I would buy an antivirus software and installing it on your computer.
AVG for example is very good.

[Sly_Old_Mole]

do a scan with free superantispyware

[Awais]

Download NOD32,Open and Install it,and after that Scan the Whole system,delete all the infected files and restart and enjoy!

[bomber1187]

Use these programs to clean your PC. Download Malwarebytes http://www.surfright.nl/en. Update and scan with Malwarebytes and Superantispyware but no updating is needed for Hitman since its cloud based. They should find it. The free versions of Malwarebytes and Superantispyware are good enough for scanning no need to get the full versions. Also download WOT at Mywot.com for Either IE or Firefox if you want to block sites or Chrome or Opera if you want to have protection for those with a warning, no blocking of websites for those browsers yet. Once you have it installed you will see the WOT circle next to your URL bar. Left click it and hit settings, then go to warnings and hit very affective, then on behavior have the switch facing down on "blocked" then scroll down and hit apply. It will now block malicious sites that it has in its data base.