how to change virtual memory location (page file)

If you want you can change the path of virtual memory (page file) location. this is useful when you running out disk space of C: drive (by default page file created in windows partition) imagine you have 2Gb of physical ram, then system automatically allocate disk space, 1.5 of physical ram for a page file, that's a heavy disk cost, in this case you can save disk space in C: drive by changing the page file location. follow these steps.

• Right click on my computer and click properties
• Go to advanced tab
• In there click on the settings button under "performance"
• In performance option window, click advanced tab
• Now click change button under "virtual memory"
• In the virtual memory window, click the partition that has more disk space (ex-D: drive)
• Now in the custom size area set minimum and maximum value for a page file. (for example - 2 Gb of system ram, minimum can set as 2046 and maximum can set as 4092)
• After setting the value click set button. now you are successfully change the page file location to D: drive,
• only thing thing to do is clear page file from C: drive
• In the virtual memory window, click C: drive
• Now click on the No paging file and click set button
• Click ok, then apply and ok
• Again click apply and ok
• Now restart the pc to changes go into effect

Note - after restarting the pc you will notice that there is more space available in C: drive, to gain more space in C: drive read this

disable "drivers not digitally singed" message

In windows xp, when you plug new device (bluetooth device, card reader) and try to install its drivers, sometimes you may see "driver not digitally singed" warning message. however you can continue installing drivers ignoring the warning message. hardware manufacturers provide more stable drivers for your device, there for you dont want to see warning messages evertime you plug a device. in this post we are going to show you how to disable "driver not digitally singed" warning message. you can learn more information's in here about digitally singed drivers.

• Right click on my computer
• Click properties
• Click hardware tab
• In there click the button driver signing under "drivers" section
• In the opened driver singing option window, click "Ignore - install the software anyway and don't ask for my approval"
• Click ok
  
• Then apply and ok
  

disable "turn off computer" from start menu

You can prevent users from shutting down public computer, with some edit of registry you can disable "turn off computer" option. here is how to do it.

• Open registry editor
• Navigate to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
• In the right side create new DWORD value and named it as Noclose
• Now double click the key and put 1 in the value data field
• Now close the registry editor and restart your computer after any changes to go into effect

Note - if you want to enable "turn off computer" option again, simply put 0 in the value data field of Noclose key, or delete the key.

create shortcut to lock workstation

Here is how to create shortcut

• Right click on desktop point to new and click shortcut
• In the location filed type %windir%\System32\rundll32.exe user32.dll,LockWorkStation
• Click next
• Give it a name and click finish

Now when you double click shortcut, your workstation will be locked

Note - another method is, press window key and L key simultaneously to lock workstation instantly, i know this one is quick rather than creating shortcut, but shortcut is useful to lock a computer remotely

DDR 1/2/3 memory speed chart

The below details described as Memory type (pc2100), speed (266Mhz) , and bus speed (133Mhz)


DDR1

DDR1 - PC2100 - 266Mhz - 133MHz
DDR1 - PC2700 - 333MHz - 166MHz
DDR1 - PC3200 - 400MHz - 200MHz
DDR1 - PC3500 - 433MHz - 216MHz
DDR1 - PC3700 - 466MHz - 233MHz
DDR1 - PC4000 - 500MHz - 250MHz
DDR1 - PC4200 - 533MHz - 266MHz
DDR1 - PC4400 - 550MHz - 275MHz
DDR1 - PC4500 - 566MHz - 283MHz
DDR1 - PC4800 - 600MHz - 300MHz
DDR1 - PC5000 - 625MHz - 313MHz

DDR2

DDR2 - PC2-4200 - 533MHz - 266MHz
DDR2 - PC2-5400 - 667MHz - 333MHz
DDR2 - PC2-6000 - 750MHz - 375MHz
DDR2 - PC2-6400 - 800MHz - 400MHz
DDR2 - PC2-8000 - 1000MHz - 500MHz
DDR2 - PC2-8800 - 1100MHz - 550MHz
DDR2 - PC2-9000 - 1120MHz - 560MHz

DDR3

DDR3 - PC3-6400 - 800MHz - 400MHz
DDR3 - PC3-8500 - 1066MHz - 533MHz
DDR3 - PC3-10666 - 1333MHz - 667MHz
DDR3 - PC3-12800 - 1600MHz - 800MHz
DDR3 - PC3-14400 - 1800MHz - 900MHz
DDR3 - PC3-16000 - 2000MHz - 1000MHz