I have installed ue4 but it does not supports the 32 bit window … what to do now?
The editor does not work with 32 bit OS (Windows). Get a 64bit OS.
Since you’re running a 32b OS, I’ll assume that you’re likely to have a Windows 7 laptop with less than 4GB of RAM and no dedicated video card.
You might be unable to launch the editor (forget about any comfortable work) at all even if you get your hands on a 64b OS.