These are general recommendations:
- Enable access for restricted users. By default, restricted users are allowed to access protected application. Windows users access control option in windows users settings is set to "All users".
- Protected application should be installed by user with administrator rights. Once this is done application can be accessed by any user including restricted users.
- Always decrypt Machine ID (MID) values in order to find out which (if any) locking parameter has been changed. Please see "Machine ID feature" chapter in help file for detailed information about this.
- Use "Allow system time adjustments of up to xx minutes" option to prevent license lockup in case of turning the system clock back for small periods.
- Enable flexible machine locking.
By default, change in any of selected locking parameters will result in license reset. Application will erase current license, change site/mid codes and request new activation code.
This feature will allow you to customize default locking policy and to make it more flexible.
- Enable logging.
Use logging policy to define what information should be logged by protected application.
Protected application can log the following information:
- All messages displayed to end user (errors, notifications...)
- License activation: site code, mid code, activation code, serial number (if applicable).
- License removal: removal code
- License transfer: new site code, new activation code
- License extension: site code, mid code, activation code
- Change of locking parameter: parameter name, old hash value, new hash value
These questions should help you determining the cause of license reset:
- Did you decrypt MID codes and compare new and previous locking parameters?
Change in locking parameters will reset license. "Remote protection method error!" message is displayed in this case. Application will generate different site/mid codes and ask for new activation code. You can find out if any locking parameter is different by decrypting old and new MID codes.
- Is this computer used by restricted users or administrators only?
In case support for restricted users was not enabled switching between different user accounts could invalidate license.
- Was application installed and unlocked by user with administrator rights?
Even if support for restricted users was enabled application should be installed and unlocked by user with administrator rights in order to avoid problems in case computer is accessed from multiple (restricted) user accounts. In case application was installed and unlocked by restricted user it will work just fine for that user. However, in case it's accessed from another restricted user account it will probably refuse to work (depending on installed OS).
- Is there any removable cd/dvd/hd/ethernet/wi-fi card device in this computer?
Removable device which is often enabled/disabled (removed) can affect locking parameters and thus reset license. You can turn off appropriate locking parameters (for example net id to prevent license reset in case removable net card is often used on remote computer) in order to avoid license reset because of removable device.
Network card locking and wireless network adapters:
Primary network adapter mac address is detected and used for
generation of site/mid codes. Other network adapters are ignored at this point.
Once it is activated application will scan all network adapters (not only primary adapter) for above mac address. If adapter is disabled (this happens when you turn off wireless network switch on laptop) or removed application will not be able to find adapter with appropriate mac address and will invalidate license.
We suggest turning off wireless network during activation. In this way standard Ethernet network adapter will be set by OS as primary adapter and protection code will use its address for future checks. Turning on/off wireless adapter would not affect license status after activation as protection code would look for standard network adapter only.
- Is this computer part of network with roaming profiles enabled?
Using roaming profiles on network could affect license status. Be sure to enable "Enable support for roaming profiles" option if application is distributed to users with roaming profiles enabled. In this case protection code will handle license data in such way that it's not affected by roaming profiles.
- Did you enable "Erase previous license" option?
This option will delete existing license (if any). Keep this option off
if you are not sure that you really need it.
- Is there some kind of security software installed?
Some third party software could affect license status by deleting
license information or preventing protected application from accessing it.
- Was system time turned backward?
In case limited license feature is active license will be invalidated in case system time is turned backward. Time synchronization software could also affect license by turning system time backward.