Well for those of you who download files from the website
www.themexp.org
If you dont know, the exe file that u downloaded not only contains
the wallpapers or themes, but the installation package also install
spyware and trojans at the same time.Here's a way to rip apart the
installation package so you only get the wallapeprs/themes and
leave the trojans and spyware:
1)First download WinRar
2)Download your file from themexp.org.you should get an exe file
BUT LEAVE IT UNTOUCHED!
3)Rename your downloaded file name to a.exe
4)Put the file in your local disk drive main folder(Eg.C:\, D:\,
etc etc)
5)Now comes the most important part:
Click 'Start' 
'Run'
Type '(Local disk drive letter, where you put your downloaded
file):\a.exe /x (Local disk drive letter, where you put your
downloaded file):\a' without the quotations
For example, for my case, mine would be like: 'C:\a.exe /x c:\a' as
the letter C is my local drive letter.
6)Now, check your local drive again.There should be a new folder
named 'a'
7)Go to the new 'a' folder .You should see a file named '%EXENAME%'
and all the other spyware and trojan installtion files.LEAVE THE
SPYWARE AND TROJAN FILES UNTOUCHED.
8 )Now, double-click on your '%EXENAME%' file.In the 'OPen With'
Window, Select 'WinRAr ARchiver'
9)There you go.Once you opened the file with WinRar, you can see
your files that you want inside.