DID SYSTEM RESTORE, LOST ITUNES WONT RE-INSTALL

Question

Right, this one is bugging me.
ive just got an ipod nano for my birthday (november) and have installed all my songs onto it.
but then after a few weeks of having itunes my pc decided it didnt like its sound device, so the sound on my pc completley vanished, so we tried re-installing all the drivers, no avail.
so, (this is on windows xp) i did a system restore to an earlier restore point (before itunes was installed!)
and then did another one, before that date too!
now, i dont have sound, i dont have itunes, i dont have quicktime.
and whenever i try install any of these i get this error message
[IMG]http://i5.photobucket.com/albums/y163/vibrating_cake/ipodprob.jpg[/IMG]
http://i5.photobucket.com/albums/y163/vibrating_cake/ipodprob.jpg
same for quicktime, just with quicktime in the name rather than itunes.
this is incredibly annoying as i cant even watch dvd's on my desktop anymore because something is blocking my sound device
so what can i do?????????
(to summarise)
i have windows xp
i did two system restores BEFORE i installed ITUNES
i cant re-install ITUNES because i get an error ITUNES.MSI is on a network device which is unavailable.
i dont want to loose all my songs and albums because theres over 1000songs in there.
and itunes will not open or install!
oh... and i have tried backup on the system restore function on windows xp, wont backup BOTH system restores!

Answer 1

If you are not getting sound, go to your control panel and open: Sounds and Audio Devices Properties>>Audio tab and check that your Sound playback device is set to your sound card.
For reinstalling iTunes, after that mess I suggest you do a full removal of iTunes and related programs with Installer cleanup of any programs that do not uninstall, then a reinstall.
Here is the method, follow it carefully and don't leave anything out.
Download a fresh copy of iTunes and the stand alone version of Quicktime (the one without iTunes)
http://www.apple.com/quicktime/download/win.html
http://www.apple.com/itunes/download/
Download and install Microsoft Installer cleanup utility, there are instructions on the page as well as the download. Note that what you download is the installer not the program – you have to run it to install the program.
To run the program – All Programs>>Windows Install Cleanup
http://support.microsoft.com/kb/290301/
Now use the following method to remove iTunes and its components:
XP
http://support.apple.com/kb/HT1925
Vista
http://support.apple.com/kb/HT1923
*If you hit a problem with one of the uninstalls don't worry*, carry on with the deleting of files and folders as directed in the method.
When you get to deleting Quicktime files in the system32 folder as advised in the method, you can delete any file or folder with Quicktime in the name.
Restart your PC.
Run the Microsoft Installer Cleanup Utility. (Start > All Programs > Windows Install Clean Up)
Remove any references you find to the programs you removed - strictly speaking you only need to worry about those programs where the uninstall failed.
If you don’t see an entry for one of the programs that did not uninstall, look out for blank entries or numeric entries that look like version numbers e.g. 7.x for Quicktime or 1.x for Bonjour.
restart your PC
Install the stand alone Quicktime and check that it works.
If it does, install iTunes.