sir,I want install microsoft windows, sir,I want install microsoft windows, sir,I want install microsoft windows

Do you want to install on the iMac or the eMac? There is a huge difference in the approach required depending on the model. It is much more satisfactory on an Intel iMac than the older slower eMac. You may wish to repost the question in the forum for curent iMacs here:

iMac (Intel)

So we know more about it...

At the Apple Icon at top left>About this Mac, then click on More Info, then click on Hardware> and report this upto but not including the Serial#...

Hardware Overview:

Model Name: eMac

Model Identifier: PowerMac6,4

Processor Name: PowerPC G4 (1.2)

Processor Speed: 1.42 GHz

Number Of CPUs: 1

L2 Cache (per CPU): 512 KB

Memory: 2 GB

Bus Speed: 167 MHz

Boot ROM Version: 4.9.2f1