"Application popup: Windows - Delayed Write Failed : Windows was unable to save all the data for the file 'xxx'. The data has been lost. This error may be caused by a failure of your computer hardware or network connection. Please try to save this file elsewhere."
I had this error recently during my nightly backups. I narrowed it down to my server’s 10/100/1000Mbps LAN card. Since my network is only 10/100Mbps I forced the speed and duplex to 100Mpbs and Full Duplex rather than Auto Negotiate. After I did this the error went away and my network latency issues got better.
"You must use the Role Management Tool to install or configure Microsoft .NET Framework 3.0 x64 (or x86) (Windows 2008)"
Under Windows 2008 .NET is considered a Feature; to install open up the Server Manager and highlight Features -> Add Feature it is at the top of the list. To install the .NET 3.5 framework use the installer method.