what if i reinstall the product, will the product needs to be purchased again?

[anoradelattre 0]

I can't see the Eset antivirus on the tray icon and whenever I click it to the file location, it does not run and i think i might need to reinstall the product. 

[Marcos 5,468]

If you install an ESET product from scratch, you'll only need to enter your license key during or after installation to activate it. Only if your license runs out you'll need to purchase a renewal.