Hiya sumar
You haven't said which browser you're using but assuming it's one of the IEs, have you tried deleting the contents of C:/Windows/Temp. You may not be able to delete all of them but it's worth a try. Then there's the contents of C:/Windows/Prefetch, then the contents of C:/Documents and Settings/UserName/Local Settings/Temp. With all these only delete the contents of the folders, not the folders themselves. Then delete all your cookies, temp files and delete the history. Then run a disk clean up - right click the hard drive in My Computer and choose Properties, then Disk Cleanup. If you've the time maybe you could do a defrag while you're there.