The Brenda Macro virus changes the registry to play tricks on the user. The changes include:
- Name of "My Computer" is replaced with "Little Miss Nick"
- If the machine has WinZip it is registered to "Nick FitzGerald the queen"
- The game "Hearts" is renamed to "NicKKK"
- A new user account is added with the name of Asexual
- Label of drive C: is changed to "n0nuts"
These changes can be reverted by restoring the registry to its original state. No permanent damage is done.