See here for how to prepatch sav corporate: http://service1.symantec.com/SUPPORT/ent-s...004060809175548 To install latest virus definitions manually: 1. download them from http://securityresponse.symantec.com/avcen...s/US-SAVCE.html 2. unpack the exe file (it's a rar sfx) 3. run `updater /q /extract <somewhere>' to extract the definitions 4. move all files except zdone.dat into `c:\program files\common files\symantec shared\virusdefs\incoming' 5. move zdone.dat there (there's a page somewhere at symantec site that describes this, but i can't find it right now.) edit: maybe it's http://definitions.symantec.com/defs/update.txt - not sure