Your computer has been severely infected by trojan horse, that is WCWDU16814728.EXE. This is quite dangerous and unsafe for your PC and there may be other infections on your PC. You should urgently check your PC and remove any malicious application including WCWDU16814728.EXE as soon as possible.

Location : C:\Documents and Settings\UserName\Application Data\Google\wcwdu16814728.exe
Type : FakeAlert, Trojan Horse
Dangerous : YES
Removal : Immediately

 
How to get rid of WCWDU16814728.EXE [ Manual Removal Method ]