How can I disable the user to change date time in Windows using VB.Net?

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I have been searching for codes to disable the datetime change in the system. but i cant find any. Can anyone tell me if its possible and tell me how to do it? thanks in advance.

I need to use this for the PC management. The user might change the date and time so that they could extend time in using the PC.

And I just want to add that the program I have developed is running ONLY on admin. so... what to do?

OR HOW CAN I GIVE ALERT IF THE USER HAS TRIED TO CHANGE THE DATE TIME..then save to database ?

Posted 15-Oct-14 15:22pm

NekoNao

Updated 15-Oct-14 15:26pm

v2

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Sergey Alexandrovich Kryukov 15-Oct-14 21:34pm

Why?
—SA

Sergey Alexandrovich Kryukov 15-Oct-14 23:05pm

Also, please stop posting fake "solutions". Some of them should be comments or updates to the questions. Posting what you post as "solution" is considered as abuse.
—SA

2 solutions

Solution 2

If you really want a clock that cannot be changed by user then use a time server. http://en.wikipedia.org/wiki/Time_server[^] This is totally independent of PC clock and so is unaffected by anything the user does locally.

http://stackoverflow.com/questions/1193955/how-to-query-an-ntp-server-using-c[^]

Plenty more using google.

Posted 15-Oct-14 17:25pm

User 59241

Updated 15-Oct-14 17:28pm

v2

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Sergey Alexandrovich Kryukov · Accepted Answer · 2014-10-15T15:36:00

Solution 1

Changing time on the system is one of the fundamental user's rights you cannot take out by any means, unless you want to make OS non-functional. If you could, it would be a serious crime against the user. Forget it.

If you want to capture the time change event (why?!), please see: http://www.stevebunting.org/udpd4n6/forensics/timechange.htm[^].

—SA

Posted 15-Oct-14 15:36pm

Sergey Alexandrovich Kryukov

Updated 15-Oct-14 15:37pm

v2

Comments

NekoNao 15-Oct-14 21:42pm

because . we are using the program to monitor the use of the PC (users can only use it for limited time). and they should not be allowed to change time. but you know, there are users that is so greedy that they might change the time so that they can use the pc more.. and we dont want to take that risk

NekoNao 15-Oct-14 21:47pm

Even if users can change date time,. is it possible to have it monitored. that would save to database in case date time has been changed by certain user?

Sergey Alexandrovich Kryukov 15-Oct-14 23:01pm

Didn't I answer this part of your question?
—SA

Sergey Alexandrovich Kryukov 15-Oct-14 23:00pm

I already told you: forget it. The users who badly want to copy your product, will do it anyway, don't worry.
But who is greedy?

Better think what do you want to do: assuming some users want to steal you product (I doubt it, but let's assume it), you want to steal the whole system from your users, event those willing to pay for your product. I wish your potential users already knew about your intentions, then no one would ever try to use your product, to stay out of trouble.

—SA

NekoNao 15-Oct-14 23:02pm

okay .thanks!

Sergey Alexandrovich Kryukov 15-Oct-14 23:08pm

You are welcome.
—SA