and it wont show up in instaled updates??
Not sure I understand this one. Are you asking if it will still show up as an offered update, or that it isn't showing as an installed update? If the first it will show up as an offered update until you either install it or set it as hidden. If the second have a look through all installed programs instead, if it is there it could be listed as from C-Media or it could be listed under the name of the headset manufacturer.
As far as the rollback option being grayed out it is only available if the driver
has been updated at some point in time.
Now for the bad news regarding C-Media audio device users,
Drivers | C-Media Electronics
Due to the expiration of Sensaura license, the driver download site will be temporarily suspended. We will reopen the download site when the new driver is available.
and has been that way since late September of this year. Means that you are stuck with whatever driver was available from the device manufacturer (Auzentech, BGears, HT Omega, etc) prior to that date, until such time as C-Media re-negotiates the Sensura license or finds an alternative.
P.S. What is the make and model number of your headset? CM108 is just the audio chip in it, not who the headset was made by.