How to Enable Photo Viewer in Server 2008 R2

Go to Administrative Tools from Control Panel, Click Server Manager select Features -> Add-> Desktop Experience -> Install-> Click Add Required Features and Click Install button. After successfully installation, click Close button and restart Window Server 2008 R2. Now you can see Windows Photo Viewer is available.

To view the Version History of doc uploaded

1. Under the Document uploaded part pls select the Edit Web Part, 

2. in webpart, under Library Tool select Library then select Library settings. 

3.then select Versioning settings under the General Settings there u get a page for select the type of versioning(major or minor), then u get press OK button on there..

BackUp and Restore the sharepoint site

Create a folder in your C drive called backup. Then give the path as C:\backup
This will save the backup file in c:\backup folder
You dont have to mention the \\ before C:
\\ is used if you are trying to save the backup in a shared location. Ex: \\sysname\foldername