help how to root HTC desire s Please help me how to root HTC  desire s
Check out this link:

How To Root and Install Custom Recovery On The HTC Desire S

ONLY FOR WINDOWS COMPUTERS


Take note of your phone’s serial number. Look for it in the battery compartment. It’s usually beside the label “S/N” in the battery compartment. Copy the serial number accurately.


2.Find out the HBoot version of your phone. To do that, reboot your phone into bootloader mode. First, turn off your phone. Then, turn it back on by pressing the Volume Down button and Power button together for a few seconds. Your phone will start in bootloader mode. The screen will show you the HBoot version. Copy the HBoot version number.


Turn your phone off and turn it on again normally.


4.Download su-2.3.6.3-efgh-signed.zip. Save it to your desktop. Do not extract the ZIP file. Copy the ZIP file to the root of your phone’s SD card.


Enable USB debugging in “Settings > Applications > Development > USB Debugging”.


6.Turn off the Fast boot option from “Settings > Power > Fast boot.”


Download the HTC Sync drivers into your phone. Install the drivers to your computer. These are for Windows machines only.


8.Go to http://revolutionary.io and download Revolutionary: S-OFF &amp; Recovery Tool 0.4pre4 by clicking on the “Download for Windows” link in the Downloads section. A form will also appear below the link after you click the link.


Fill out the form with your operating system (Windows), device name (HTC Desire S), HBOOT version (you copied this as instructed in a previous step), and your device’s serial number (you also copied this as instructed in a previous step).


10.Click the Generate Key button. The page that appears will show you your beta key. Copy this key exactly as shown. It is case-sensitive.


Extract the contents of revolutionary-0.4pre4.zip into a folder on your computer.


12.Connect your phone via the USB cable. If your phone asks you for a connection type, choose “HTC Sync” and just ignore the warnings.


Launch the Revolutionary tool (revolutionary.exe). A command prompt window will open and will ask you for the beta key.


14.Type or copy-and-paste the beta key for Revolutionary into the command prompt window. The beta key is case-sensitive. Press Enter to allow the tool to proceed.


Wait a little bit for Revolutionary to enable S-OFF and unlock the rewritable NAND on your handset. If the program asks you to install ClockworkMod Recovery, choose to do so.


16.Reboot your phone. Then, turn it off again.


Boot into bootloader mode by pressing the Volume Down and Power buttons together. Enter recovery mode by selecting Recovery from the list. Use the Volume Up/Down keys to scroll through the list and use the Power button to select.


18.In ClockworkMod Recovery, choose “install zip from sdcard,” then choose “choose zip from sdcard.”


Find su-2.3.6.3-efgh-signed.zip on the list and press the Power button to select it. Wait a little bit for the process to finish.


20.Reboot your phone. It is now rooted and already has custom recovery installed.

Hope It Helps!