>>Seems like a difficult one to solve
>>
>>Try the last post of this http://social.msdn.microsoft.com/Forums/en/netfxnetcom/thread/47a20542-cc1a-4ca1-b570-5d3eb9fc5730
>>
>>

>>request.KeepAlive = False
>>request.UseBinary = True
>>request.UsePassive = True
>>
>>request.TimeOut = 10000000
>>request.ReadWriteTimeOut = 10000000 
>>

>>
>>Not sure whether it will solve the problem
>
>Thanks, one thing I have observed is that this has happened practically right after I activated the security on my PC by enabling the password protection. Basically, whenever I finish a work timeframe, I simply press Ctlr-Alt-Delete and secure the PC. I find this quite exceptionnal that at both occasions, it happened pretty much right after this was done.
>
>I have applied the changes. We will see how it goes.

You can also use WindowsLogoKey-L to immediately lock your computer.