Why did you choose Enterprise? There are plenty of links to "proper" versions on this site, which are able to be activated by Daz's Loader.
You can download any of the windows 7 links in the above post and use DAZ loader, it works like charm with them.
There is nothing wrong with Enterprise using KMS activation. You can either use internet based KMS servers or local KMS servers and will stay activated and reactivate automatically. Best part is that there is no loader. W7 Professional can also be KMS activated.
If using internet KMS servers, u will stay activated & reactivate automatically if u r online & the kms server data is present in the registry. If using local KMS emulator then the reactivation depends on ur choice. In both cases, it will stay validated and genuine!!