If you are uncertain whether you have a TPM module or if it has been enabled then open the command line (type com in the search area, and run as Administrator), once there type tpm.msc.
If this opens a dialog then you have tpm installed and enabled. If not then check your bios (normally an advanced section item) and turn it on if you have it. You should get dire warnings of what will happen if in future you change the cpu, other than that I think it is generally a harmless switch that gives you more protection against some forms of ransom-ware. (If anyone knows better please yell!)
If you do not have tpm, then check if your mobo allows a tpm module to be added. (These items are already being back-ordered, so you may want to get ahead of an even bigger queue later on!
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