kbdus.dll by the looks of it is related to keyboards.
Ensure that there are no errors under device manager and try using the driver update feature in device manager.
Alternatively if you still believe your infected try the steps below...
Please download and install Super Anti Spyware
1.Double click SUPERAntiSypware.exe and use the default settings for installation
2.When the installation finishes a shortcut on your desktop will be created, please double click that to launch SAS
3.If asked to update the programs definitions please click Yes . If not then update the definitions before scanning by clicking Check for Updates
4.Under the Configuration and Preferences, click the Preferences button
5.Click the General and startup tab, and under Start-Up Options, make sure Start SUPERAntiSpyware when windows starts is Unchecked.
6.Click the "Scanning Control" tab, and under Scanner
Options make sure the that the following are checked (leave all others unchecked):
Close browsers before scanning.
Scan for tracking cookies.
Terminate memory threats before quarantining.
7.Click the Close button to leave the control center screen and exit the program.
8.Do not run a scan just yet.Reboot your computer in "Safe Mode " using the F8 method. To do this, restart your computer and after hearing your computer beep once during startup (but before the Windows icon appears) press the F8 key repeatedly. A menu will appear with several options. Use the arrow keys to navigate and select the option to run Windows in "Safe Mode".
Scan with SUPERAntiSpyware once in safe mode using the instructions below:
1.Launch the program and back on the main screen, under "Scan for Harmful Software" click Scan your computer.
2.On the left, make sure you check C:\Fixed Drive.
3.On the right, under "Complete Scan", choose Perform Complete Scan and click "Next".
4.After the scan is complete, a Scan Summary box will appear with potentially harmful items that were detected. Click "OK".
5.Make sure everything has a checkmark next to it and click "Next".
6.A notification will appear that "Quarantine and Removal is Complete". Click "OK" and then click the "Finish" button to return to the main menu.
7.If asked if you want to reboot, click "Yes" and reboot normally.
8.To retrieve the removal information after reboot, launch SUPERAntispyware again.
1.Click Preferences, then click the Statistics/Logs tab.
2.Under Scanner Logs, double-click SUPERAntiSpyware Scan Log.
3.If there are several logs, click the current dated log and press View log. A text file will open in your default text editor.
4.Please copy and paste the Scan Log results in your next reply.
9.Click Close to exit the program.