Increase Free Space On OS Installed Drive in Windows 7 / Vista

Step 1.  Using Disk Clean up
1. Open My Computer
2. Select the OS Installed Drive And Right Click it.
3. Click Properties
4. Click on "Disk Clean UP" ( This Process May Take  Few Minutes)
5. Tick All the Boxes
6. Then Click OK
7. Repeat Sub-Step  2 to 4
8. Click on " Clean up System Files "
9. Then click Ok
10. Finish
Step 2  Clean Temp Folder
1.Press Windows Key + R (Or  Click the Start Menu  Type "RUN' in the "Search Programs and files" Box ) and Press ENTER
2. Type "TEMP" in the  Run Box  and Press Enter
3. Press Control Key + A ( For Select all the files Or Click "Organize" tab and Click "Select All".
4. Press Shift key +Delete Key (For Removing all files in the Temp Folder)
5 A Confirmation window opened click on "Yes"
6. Finish
Step 3 Clean User Temp Folder
1.Press Windows Key + R (Or  Click the Start Menu  Type "RUN' in the "Search Programs and files" Box)  and Press ENTER
2. Type "%TEMP%" in the  Run Box  and Press Enter
3. Press Control Key + A ( For Select all the files Or Click "Organize" tab and Click "Select All".
4. Press Shift key +Delete Key (For Removing all files in the Temp Folder)
5 A Confirmation window opened click on "Yes" ( Some files cant  deleted then click the 'Skip' Button)
6. Finish
Step 4 Disable Hibernation
1. Click Start, and then type cmd in the Start Search box.
2. In the search results list, right-click Command Prompt, and then click Run as Administrator.
3. When you are prompted by User Account Control, click Continue.
4. At the command prompt, type "powercfg.exe /hibernate off ", and then press ENTER. (or type "POWERCFG -H OFF")
5. Type exit and then press ENTER to close the Command Prompt window.
6. Finish
Step 5 Decrease winsxs folder size
1. Click Start, and then type cmd in the Start Search box.
2. In the search results list, right-click Command Prompt, and then click Run as Administrator.
3. When you are prompted by User Account Control, click Continue.
4. At the command prompt, type "dism /online /cleanup-image /spsuperseded ", and then press ENTER.
5. Type exit and then press ENTER to close the Command Prompt window.
6. Finish
Step 6 Restart the system.. and Enjoy...