If your virtual hard disk data is corrupted or damaged and you want to repair it, then try Kernel for VHD Recovery tool. This software has several advance features to get back all the deleted or lost data from Virtual machine. It allows recovery of all the data like database, Office files, audio, image, videos, archive and backup files and other data. This software performs recovery accurately and without any loss of data. To find more information about VHD recovery tool, visit http://www.vhdrecoverytool.com/

If your access database fie is corrupted and you are searching for how to repair it, then I would like to suggest two way for repairing it.
1. Use "Compact and Repair" feature to repair corrupt MS Access database file.
2. Use 3rd-party access file repair tool.
Both methods can be applied for repairing and recovering corrupt or damaged access database file. Bit I recommned 3rd-party tool because it is very easy to use and reliable. There no chance to loss data. 

Features of Accees Recovery Tool:

• It repairs ms access MDB and ACCDB files
• Restore tables, macros and other items from Access file
• All data are recovered in exact shape without alterations
• Show preview of items before recovery, to reselect tables
• Provide options to export file with schema or schema with data
• Repair oversized corrupted Access database
• Supports Windows Operating System versions such as Win 8, Win 7, Vista, XP and Previous version

Find more informaion here:- http://www.accessrepair.recoveryfiles.org/