IMA service not starting with error :
"The Citrix Independent Management Architecture service terminated with service-specific error 2147483649 (0x80000001)."
? There are plenty of help pages available through Google, but try this command first:
"dsmaint /verifylhc" from a command line, then try re-starting IMA + any other failed Citrix services
It could be that your licensing DB is corrupt. If the above command fails, try "dsmaint/recreatelhc". Obviously this gives you a brand new licensing DB, but itmight (easily) solve the above problem.