Hi,
Since going through the general steps to disable/remove unknown devices did not resolve the issue, and if you wants to have the devices removed, you may perform an InPlace Upgrade.
How to Perform an In-Place Upgrade on Windows 7 http://support.microsoft.com/kb/2255099
Warning:
An in-place upgrade is the final alternative before you have to reinstall the operating system. Note that it takes the same amount of time to do the upgrade as to reinstall the operating system. Also, some of your customized Windows settings may be lost through
this process.
You may performing a repair installation will not damage files and applications that are currently installed on your computer. To be on the safer side, I would suggest
you to backup your files before you go for repair installation.
Refer the link to backup the files.
http://support.microsoft.com/kb/322756