upgrading from 2008 R2 to 2012 server

I need to upgrade a windows 2008 R2 server to 2012.  It's running VEEAM and CA BrightStor backup software.  I do have two instances of SQL express on it.  I'm also running Hyper-V on it.   Will this be a transparent and seamless install or do I need to prepare for drama?
gopher_49Asked:
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Brad BouchardConnect With a Mentor Information Systems Security OfficerCommented:
Should be pretty much drama free.  You may need to check some services (SQL specific) once the upgrade is done, but other than that it should be just fine.  

Check this:  http://blogs.technet.com/b/chrisavis/archive/2013/10/01/performing-an-in-place-upgrade-of-server-2008-r2-to-server-2012-r2.aspx

I used to do this all the time for a IT consulting firm I worked for and had zero issues.
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Brad BouchardInformation Systems Security OfficerCommented:
I should note that I did servers running SQL, not VEEAM, but AppAssure and similar apps.
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Lee W, MVPTechnology and Business Process AdvisorCommented:
A clean install is always better as it ensures you don't have any problems with old code mixing with new code.  If you insist on doing this as an upgrade, I would STRONGLY recommend you make sure you have known good backups.  While the process SHOULD be easily done, you never know when you have problems and with Murphy's law, it's best to be prepared to ensure there is no problem.
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gopher_49Author Commented:
I don't have any actual data that I need to worry about.  My flat VEEAM backup files will be okay..  So..  Not worried about those..  The actual Hyper-V files will be okay..  Worse case scenario they'll have to be upgraded if 2012 have a different guest OS implementation.  If I have to reinstall my backup software that's okay..  I guess I'll power the Hyper-V VMs off after hours and give it a shot...
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Brad BouchardInformation Systems Security OfficerCommented:
I would STRONGLY recommend you make sure you have known good backups.  While the process SHOULD be easily done, you never know when you have problems and with Murphy's law, it's best to be prepared to ensure there is no problem.
Agreed.
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Brad BouchardInformation Systems Security OfficerCommented:
What you could do if VMs did become an issue is use VEEAM and restore them to 2012.  There shouldn't be an issue though.
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