HackTrick

This tip is very interesting for home and some small office users, who wants to restrict user's ability to shutdown their computer. You can hide the Shutdown button from the Start menu using registry editor and also restrict access to shutdown .

Follow the given steps to hide system shutdown button from start menu:

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To use this feature, you will need to be logged into your computer with

administrative rights.

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Click Start button and type regedit in Run option then press Enter for next.
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Here locate the location to:
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HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion \Policies\Explorer

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Here in right side panel, right click to create a new DWORD value with name NoClose.
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Now assign number 1 to its value data box.
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Now close the registry editor and restart your computer after any changes to go into effect.
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But next time, if you want to unhide the shutdown button then simply change the value data box to 0 or delete this DWORD item.
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Again close the registry editor and restart your computer after any changes to go into effect.

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Many times in schools, colleges & offices surfing some sites like orkut,etc are banned !
To overcome this you can unblock these or block some other websites and play pranks !

Do The Following :
For eg you want to block www.xyz.com !

* Open the folder C:\WINDOWS\system32\drivers\etc
* There you will find a file named HOSTS
* Click on the file and press SHIFT and now right click on it .
* From the right click menu select Open with .
* Now, select Notepad to open the file from the list !
* Now, in the file under the line 127.0.0.1 localhost add another line as 127.0.0.2 www.xyz.com.
* Now, File>>Save !

Now, open your web browser and try openning www.xyz.com , it will not load !

To unblock sites just do the opposite !

1.Minimize Hack

The first hack that I have here is the popular Firefox Minimize Hack that has recently flashed through the internet. The purpose of this hack tries to keep Firefox from eating up your physical RAM and instead puts the burden on your hard drive, or at least that is the general reason behind it. To implement this hack, perform the following steps.
1. With Firefox up and running, type about:config and hit enter.
2. Right click on the new page and select New -> Boolean.
3. In the pop-up window, type in “config.trim_on_minimize” without quotes and hit enter.
4. In the next pop-up window, select True and hit enter.
5. Restart your browser

Result:With that done, open up a bunch of tabs and monitor the memory usage. In my first run without this hack, Firefox was using 137.8 Mb of Ram. With all 30 tabs open again, Firefox was using 118.4 Mb, but when minimized this dropped to an astounding 4 Mb. However, this was too good to be true, I left Firefox minimized and came back 12 minutes later and the memory use had slowly creeped up to 42.4 Mb. While this was 10 times larger than the initial 4.2 Mb, I was still saving about 75 Mb.