Regedit:
V6 an less – HKEY_LOCAL_MACHINE\SOFTWARE\TrendMicro\PC-cillinNTCorp\CurrentVersion\Misc
V7 and up – HKEY_LOCAL_MACHINE\SOFTWARE\TrendMicro\UniClient\1600\Misc
AllowUninstall change to 1
NoPwdProtect change to 1
Source: smartnetadmin
Regedit:
V6 an less – HKEY_LOCAL_MACHINE\SOFTWARE\TrendMicro\PC-cillinNTCorp\CurrentVersion\Misc
V7 and up – HKEY_LOCAL_MACHINE\SOFTWARE\TrendMicro\UniClient\1600\Misc
AllowUninstall change to 1
NoPwdProtect change to 1
Source: smartnetadmin