Is dwm.exe is a virus?how to disable the dwm.exe process in windows7

Desktop Window Manager (dwm.exe) is the window manager that gives you effects like transparent windows, live taskbar thumbnails, quick re-size and preview, flip feature and many more in Windows Vista And 7.It's not a virus!
But It consumes most of memory (approximately 55MB per windows,task).

Here are the steps to stop this dwm.exe temporarily without disabling it to speed up your PC
-->Type “Service” into the search box
--> Select the “Service” link
-->Right click on “Desktop Windows Manager Session”
--> Select “Stop” to stop it from running

Disable dwm from startup
--> Double click on “Desktop Windows Manager Session”
--> Select “Disable” as shown in screenshot
-->Click “OK”

How to shrink volume in windows7

After Buying a windows7 installed laptop, many users face the problem that there is only one drive for maximum GB allocated.

That is c: is allocated(for ex 320GB),Now you need to shrink this volume in to more manageable drives, so that you can seperate the data and avoid loss of data when windows is corrupted.
Follow these steps
1.Press Windows+r and type "diskmgmt.msc" without quotes
2.Right click the c: and select shrink volume
3.Type the amount of gb you have to shrink by default
it shows maximum GB to be shrinked so type those values in the box,press ok

4.Now some unallocated space has been created
5.Right click the unallocated space and click create simple volume and give a
letter for the drive and format drive with default ntfs system and press ok

6.Now you have your new drives created so that you can seperate os from data drive.

Is there any doubt ask me.Happy weekend