The activator is based on ZWT KMS-Keygen.
KMS-Keygen is installed as Windows Service, not too much memory used, around 2 mb of RAM.
Code generated by KMS-Keygen is not always valid, that s why sometimes activation may fail.
In this case just repeat activation request.
This is KMS-Keygen problem, but not the the activator fault.

Activator works on 32 and 64 edition of Office 2010 and Windows 6.0 or newer.
Activator has following functions:
- Activation of Office 2010 VL products
- Activation status check of Office 2010 products
- Trial reset for all Office 2010 products and Windows 6.0 or newer
- Entering of KMS-Client keys for all Windows VL editions
- Activation of Windows 6.0+ VL products
- Activation status check of Windows 6.0+ products