How can I find my version of Symantec on Windows?

Using Disk Managemeno find out how much free space is on drive C:. Also, how much space did the Windows 7 installation use? Answers may vary. What is the size of the Windows.old folder? What is the purpose of this folder? Answers for first question may vary. The purpose of the Windows.old folder is to hold the older Vista installation. ................
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