Follow these three easy steps to determine which version is installed on your PC.

1. On the taskbar at the bottom of your screen, click Start or the Windows logo. If your menu has a 'Start Search' field, continue to step 2a. Otherwise, click Run and continue to step 2b.

2. Search or Open

1. In the Search box, type winver. Double-click winver.exe from the results and continue to step 3.

2. In the Open box, type winver and then click OK.

3. The resulting window shows your operating system version.

The lower case -upper case problem along with the space provided at the start causes the link to be broken or provide it invalid link .

You may use the down loadable tool which is available for this fearure.