Lock ur PC using NET User

An anonymous reader’s son plays games on his computer all day,
neglecting his studies. He wants to impose some restriction on his son’s PC
usage, so that he could concentrate more in his studies.

Well, there are lots of paid software available, but I hardly know any
freeware which can restrict access to your PC. Inorder to effectively restrict
access to your PC for based on timings; you can make use of NET USER command
with the following syntax

net user username /times:{day[-day][,day[-day]]
,time[-time][,time[-time]]
[;…] all}

Some Examples:

• net user john /time:M-F,08:00-17:00
• net user john /time:M-F,8am-5pm
• net user john /time:M,4am-5pm;T,1pm-3pm;W-F,8:00-17:00
• net user john/time:all (this allows user to logon at any time,
  on any day)

How to?

1. Go to command prompt from Start > Run and type “cmd” (without
   quotes)
2. Type any one of the appropriate net user command to restrict the
   user
3. Type “exit” (without quotes)

Note: The time is limited to one hour increment,
which means you can only restrict the user by one-one hour (like 13:00, 16:00,
not 13:30 or 16:45). You can use the abbreviation for the day (that is,
M,T,W,Th,F,Sa,Su)

So keep focused
John.