Being a fairly new user of ATIH 2009 i just recently installed build 9709, and now i´ve found an update (at acronis.eu) to that version, namely 9770. Checking knowledge base (http://kb.acronis.com/content/1541) tells me that i just can install on top over the older version with no problem, just choose Repair/Upgrade option when starting the installer. The problem is, that option never shows up when starting the procedure..... Is it still safe to install on top of the old version, despite the fact that the knowledge base probably (maybe?) refers to an obsolete function in the update process (the KB article is from 2006)? EDIT: Forgot to mention, i´m on Vista Ultimate x64.