Click on the link below and download the file to your desktop. Once it's there, RIGHT CLICK on the file, choose "Install" from the menu.. Let it proceed through it's quick install routine, then restart the computer..

http://download.nai.com/products/mcafee-avert/Fixswen.inf

Once that's done, then try to follow the steps below to download and run Malwarebytes.

Please download Malwarebytes' Anti-Malware from Here

Double Click mbam-setup.exe to install the application.

* Make sure a checkmark is placed next to Update Malwarebytes' Anti-Malware and Launch Malwarebytes' Anti-Malware, then click Finish.
* If an update is found, it will download and install the latest version.
* Once the program has loaded, select "Perform Quick Scan", then click Scan.
* The scan may take some time to finish,so please be patient.
* When the scan is complete, click OK, then Show Results to view the results.
* Make sure that everything is checked, and click Remove Selected.
* When disinfection is completed, a log will open in Notepad and you may be prompted to Restart.
* The log is automatically saved by MBAM and can be viewed by clicking the Logs tab in MBAM.

Extra Note:
If MBAM encounters a file that is difficult to remove,you will be presented with 1 of 2 prompts,click OK to either and let MBAM proceed with the disinfection process,if asked to restart the computer,please do so immediately.

Hope this helps and let us know how it goes.

Grif