Before download
UMOSTEK verifies the order, payment, entitlement, supported platform, architecture, package version, and update eligibility.

Authorized downloads are customer-bound, product-bound, order-bound, time-limited, revocable, logged, and checksum verified.
Each link is tied to the customer, company, product, order, platform, architecture, expiration, package checksum, and audit record.
UMOSTEK verifies the order, payment, entitlement, supported platform, architecture, package version, and update eligibility.
The client verifies the signed manifest, SHA-256 package hash, required free space, maintenance window, and rollback reference.
The product runs a health test, reports results, and restores the prior program version if verification fails—without deleting customer records.