the keyboard and pc are Medion,delivered together, only a month old and it worked fine untill ms office install. I have already downloaded driver from Medion ,plus udate driver from MS.: win8 answers- driver deactivated - another driver is installed now - the best driver installed. I tried to put the old driver back but it is now unreadable/currupt even though I dowloaded new one.
 I get this ANSWER in device manager:
Windows can not start this hardware device because its configuration information (in the registry) is incomplete or damaged. (Code 19)

there is a HID-keyboard device driver - configuration information (in the registry) is incomplete or damaged. (Code 19)
there is a HID-compatible device driver - this is the one installed with ms office apparently
if i update/deactivate or remove - i get  HID-compatible device driver
if i choose the HID-keyboard device driver after removal - configuration information (in the registry) is incomplete or damaged. (Code 19)
always back to start  

PLEASE HELP i'm really TIRED of using monitor keyboard.That should never happen. Consider retraining the system for a full refund or exchange. A typical user should never, ever have to TROUBLE shoot a new computer over such a thing as a keyboard malfunction.
I WOULD gladly give some ideas about how to fix this, but I think it is just morally wrong for a user to try and fix something the maker overlooked.  Ask the vendor to take responsibility for your problem. I really think you shod.