I found the solution...
Hi fellows, I had the same problem with my lenovo G555. I found the problem is not on windows 7 neither virtualbox, this is in LENOVO.
I did the following and it worked!...
"if you have lenova g550 laptop and it types numbers in sequence from 1234567890123etc not letters. then do this,
(by unchecking via Control Panel/System and Security/Administrative Tools/System Configuration Startup tab). When I unchecked the following (and rebooted), the problem went away:
Startup Item: GID Desktop Application
Manufacturer: StrikeForce Technologies Inc.
Command:C:\Program Files\SFT\GuardedID\gidd.exe /s"
it was taken from here:
Link removed
Cheers!!