Hi, Please see this way. Unknown device if it clicked to trouble shoot, installed one driver , ie, the driver for some memory controller and failed on another. The problematic device was shown as mcafee , of which i only have mcafee site advisor program. I uninstalled site advisor thro their uninstaller, which when cleaned failed to clean the root legacy file. Indirectly, was it not, occupy the system base driver place when it is doing the job of site advisor and when it remains as such, acted as hardware driver.
When i uninstalled it using safe mode, it uninstalled totally and on reboot, does not show any yellow exclamation mark.
My question to you, is how a software driver, could be shown as hardware and shown as missing driver?
Now, this problem gone. Thanks again