Whatapp has downloaded but cannot get open on windows 7 on pc any advise pls

SOURCE: pls advise what is the step to get on window boot manager? and need for me to reinstall window 7 back again?

How do I restore my computer using the eRecovery Management program outside of Windows? How do I restore my computer using the eRecovery Management program outside of Windows?
Select models, with Microsoft Windows, have the ability to have the Operating System reinstalled from a hidden partition built into the computer.
Note: During the process, all data stored on your computer will be overwritten. This means all your files, such as email and photos, will be erased. Therefore, we recommend making a backup of all personal data before starting the recovery process.
Note: For video guided assistance using the eRecovery Management program to restore your computer please visit our How do I restore my computer using the eRecovery Management program? answer.

To start the system recovery:

1. Restart the computer.
2. When the Acer logo appears on the screen, press the Alt and F10 keys repeatedly.
3. If you are prompted with a Microsoft Windows boot screen, press the Enter key.
4. After the system recovery application has loaded, follow the prompts to reinstall the Operating System.

If the ability to reinstall from the previous method is not available or fails, recovery of the Operating System will need to be from Recovery Media. If you do not have a set of Acer Recovery Media, you may purchase the set online from the Acer Recovery Media Order Form..
Note: If your computer does not have an internal optical disc drive, an external optical disc drive will be required in order to recover the Operating System using Acer Recovery Media.

1. Restart the computer.
2. When the Acer logo appears on the screen, press the F12 key repeatedly to enter the computer's Boot Menu.
3. Press the CD-ROM drive eject button and insert the disc labeled System CD.
4. Close the CD-ROM tray.
5. Refer to on screen instructions to select either CDROM or USB CDROM.
6. The computer will boot from the Acer Recovery Media
7. When prompted for the Recovery CD, remove the System CD and insert the Recovery CD.
   Note: If there are multiple Recovery CDs, please insert the first of the Recovery CDs.
   
8. After the system recovery application has loaded, follow the prompts to reinstall the Operating System.

SOURCE: I have downloaded itunes to my computer but it won't open it. It is a pc laptop toshiba satellite A665D with windows 7 64 bit Why?

iTunes will install in Program Files (x86) even the 64 bit version. There are also iTunes files in Program Files as well. This is normal. It appears that the 64 bit version is really a hybrid of both 32 and 64 bit, the drivers mainly being 64 bit. Having itunes.exe 32* in the Task manager is normal

A lot of people are having problems with itunes 9.1. You can get 9.03 at this site. It ran flawlessly for me.

http://www.oldapps.com/itunes.php?old_itunes=54

hope this helps