This problem is little bit difficult to troubleshoot,but let me know anyone had the same issue. In some Computer i found that the browser downloads old file from a website instead of new file. From one of website i was trying to download a file and it gets downloaded properly. But for same url at the same time in another pc the file downloaded was different(old file) but same file name. It is not specific to a browser.It happened in about 5 PC where old file gets downloaded. What may be the reason behind this?