I'm also having problems getting updated info about WorldTech Devices. According to a Dun & Bradstreet company called Hoovers (they track and rate other companies) WorldTech is located in California. But when I tried going to the listed website I get a "site isn't loading right now" error message. WorldTech Devices, Inc. | Company Profile from Hoover
Assuming they are in fact out of business, you might be able to find a driver by using Device Manager, updating or uninstalling the existing driver, and let Windows 7 search for a comparable driver. (I'd make sure to have another keyboard available just in case.) Expand "Keyboard" > right-click on the K9852 > Update Driver Software. See if that helps. Or, after right-clicking on the K9852 > Uninstall. Then reboot and see if a driver is found and installed by Windows 7. How To Access Device Manager From the Control Panel in Windows 7
In the alternative, you could use a 3rd party company like DriverMax
. Let it scan you computer and see if they can find an updated driver.
Or, you could try running the XP driver in Compatibility Mode. Compatibility Mode