Event ID: 623 Source: esent
svchost ( ) The version store for this instance ( ) has reached its maximum size of 2Mb. It is likely that a long-running transaction is preventing cleanup of the version store and causing it to build up in size. Updates will be rejected until the long-running transaction has been completely committed or rolled back.
If all your servers are getting stuck on the welcome screen for up to 5 minutes when logging on, identify which Domain Controller they are authenticating against, disable the Smart Card Device Enumeration Service on the Domain Controller and reboot. For more details please visit https://cloudbuild.co.uk/?p=2468