Dell Inspirion 3521 Drivers for Windows 7 (32 Bit) - Specially VGA (HD Graphics 4000)

Purchased brand new laptop Dell Inspiron 3521 i3 1.8 Ghz, 4GB, 500GB. I am unable to install VGA Driver on Windows 7 (32 Bit). 

I have tried to install drivers in order mentioned at: 

http://support.dell.com/support/topics/global.aspx/support/kcs/document?c=us&docid=268873&l=en&s=gen&DoNotRedirect=y&dgc=IR&cid=254348&lid=4672891 

and also took guideline from here. 

http://www.dell.com/support/troubleshooting/sg/en/sgdhs1/KCS/kcsarticles/articleview?docid=545832

Downloaded Drivers from this site but no luck. 

http://ftp.dell.com/Pages/Drivers/inspiron-15-3521.html

After entering Service Tag, I don't see the Win 7 (32 Bit) Compatible Drivers List

http://www.dell.com/support/drivers/us/en/19/ServiceTag/J3DF1X1 

Also read below thread but 

http://en.community.dell.com/support-forums/laptop/f/3519/t/19482222.aspx

When I tried to download Intel Driver it says; 

What should I do? I am comfortable with Windows 7 Ultimate (32 Bit) but not able to install my VGA properly. Need solution please....