How to restore deleted files and data

It's recommended to make a full HDD backup before attempt, and use that image to make a try, so the original HDD and data won't demage.

Some useful tools with links:

MiniTool® Partition Wizard
Restore demaged or deleted partition, MBR with MiniTool® Partition Wizard Bootable CD

Recuva
https://www.piriform.com/recuva
Using Recuva

Testdisk and Photorec
http://www.cgsecurity.org/wiki/TestDisk_Download
Regain a lost drive using Test Disk - An Illustrated Guide

R-Linux
http://www.r-tt.com/free_linux_recovery/Download.shtml
R-Linux User's Manual

Clonezilla
http://clonezilla.org/
How to use Clonezilla live

GetDataBack (It's not full free, but one of the best.)
https://www.runtime.org/data-recovery-software.htm
Step by Step: Doing a Data Recovery with GetDataBack

Email includes a Winmail.dat attachment

Reason and solution of "email received from a sender using Outlook includes a Winmail.dat attachment" on Microsoft Knowledge Base here.

If there is no possibility to ask for resending email, you can open winmail.dat attachment with these softwares:

Winmail.dat Reader

Winmail Opener

Thunderbird Add-on: LookOut

And an online solution: http://www.winmaildat.com/

Powerpoint 2010 crashes when you play embedded video files

Problem:
Powerpoint 2010 crash when you play embedded video files

Solution:
Save file as 97-2003 .ppt format
(Of course in this case special .pptx effects, etc. lost.)

Source: Microsoft

Outlook error message: "Cannot start Microsoft Outlook" and "You need more memory or system resources. Please close some Windows and try again."

Outlook error message:
"Cannot start Microsoft Outlook"

These attempts were innefective:
Repair
Safe mode: outlook.exe /safe
Outlook /resetnavpane
Turn off Aero mode

Last I tried to make a new profile to start Mail in Control panel, but I got another error message:
"You need more memory or system resources. Please close some Windows and try again."

Solution:
Rename this registry key:

Outlook 2010 and older:

HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem


Outlook 2013:

HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Profiles

Rename it ProfilesOLD (Right click, rename.)
Then you can start Mail, and make new Outlook profile.

Warning:
Your settings in former Outlook profile will be deleted...
It's recommended to make a backup from all .pst file before you do anything.

Source: slipstick.com