1. Click on the 'Start' button located on your desktop and right click on the 'My Computer' icon. This process will locate the SystemErrorFixer application files in your hard drive.
2. Select the 'Search' option in the drop menu and type 'SystemErrorFixer' in the available search box.

3. Click on 'OK' and proceed to delete all files that appeared from your search.
4. Click on 'My Computer.'
5. Click on 'Local Disk (C:)' drive and select 'Program Files.'
6. Browse the folder and find the System Error Fixer folder. Delete the folder and all of its content.
7. Go into 'Safe Mode' by restarting your computer and pressing the 'F8' key while the computer boots up. Select the 'Safe Mode' option in the menu.
8. Open and run your computer anti-virus software. Initiate a complete scan of your computer system. If any infected files are found, select the 'Clean,' 'Heal' or 'Remove' options after the scan is complete to rectify the problem. Repeat this step if needed.