You can create a big size file using windows default command prompt itself.  Why we need huge size file? When you create virus  or you can use in your college for occupying the memory.

You may want to hide the admin or some other accounts for privacy purpose. If you are having public cafe or organization or school ,then you probably need.  I am going to guide you in this article to hide the Acccounts in Windows system.

• Now go to start->run
• Enter as "regedit" to open the registry window.
• Navigate to this Path:
  

  HKEY_LOCAL_MACHINE\Software\Microsoft\WindowsNT\CurrentVersion\Winlogon\SpecialAccounts\UserList

• In the Right pane, Right click -> New -> String Value
• Right click on the new String Value and click Rename

Go to start->run
type as regedit
and hit enter
Registry edit will open.

Navigate to this Path by clicking the plus symbol:

HKEY_CLASSES_ROOT/CLSID/{645FF040-5081-101B-9F08-00AA002F954E}

You can see as Recycle bin in right panel.

Some files will be hidden from Users. If you want to see those files,you have to edit the registry. This hack will fit for both windows xp and Vista.

Go to Start-<run
Enter as Regedit
Navigate to

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced

In the right panel ,you can see the superhidden registry
Right click on the SuperHidden

If you are the administrator of public cafe or school,this trick will be helpful for giving protection to your system.  You can disable writing to USB.  This will prevent from file stealing.  You have to login to administrator so that you can access regedit.

Go to start .  Select run.

Type as regedit and hit enter
Now navigate to

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StorageDevicePolicies

 In right panel you can find writeprotect and

It may big issue to open the Microsoft 2007 files in microsoft 2003. But it is easy to open the file in Ms 2003. You have to download the MS2007 compatibility pack for Ms2003.

Download it from here:

http://www.microsoft.com/downloads/details.aspx?FamilyId=941b3470-3ae9-4aee-8f43-c6bb74cd1466&displaylang=en

Enjoy...!!!

When i  studied second year(cse), my friends told that autorun.inf is virus.  I thought so.  Because my antivirus blocks autorun.inf files.   In third year when i search about autorun.inf file in net, i realize about the auto run file.

 Today i bring some files from my college system.  When i insert the pen drive in my system, there are lot of exe files.They are viruses.  I delete all of them.  Finally i opened the autorun.inf file in notepad and saw the instructions.  Then only i remembered that i forget to post about autorun file.  This article will give you complete details about the autorun.inf file.
This is the instructions that saved in the infected(call virus programs) autorun.inf file:

A refresh of the Inspiron 2300 series, we now have Sandy Bridge inside Dell's all-in-one touch PC. Propped up by a clear perspex stand it does little to stand out from other all-in-one PCs.

At 23 inches and with a resolution of 1920x1080, it's also rather thick at 68mm. It's rather surprising then to see the huge external power brick that comes with it — we would have thought externalising the power supply would have dropped the thickness significantly.

The big JBL sticker on the front hints that it may come with better sound than the norm, but sadly it's an unfulfilled promise; the speakers here aren't great, merely hitting the passable mark. Trebles in particular are too high, with cymbals sounding oddly compressed.

The touch technology used is infrared, meaning things can get a bit confused if you get more than two fingers in on the action. Sometimes it gets confused with even two, not understanding whether you're trying to rotate an image or resize it.

The included wireless keyboard and mouse are decent enough, but not worthy of writing home about. Vexingly, though, there's no receiver built into the 2320; you'll have to use the included USB receiver, consequently taking up one of the USB ports.

Dell has a new all-in-one PC, the Studio One 19 Desktop, which looks rather fetching in its all-white version. (The stand is a bit on the swoopy-doopy side, but I still like it.)

Prices vary, as is the Dell way, but I’d consider the $800 model the basic entry point as it adds a multi-touch screen. Even the $1,000 model won’t be much of a gaming rig with a laptop-class