Nor Windows Backup or Acer Backup Manager Backups are successful on my laptop.

Hi there,

Last week I bought an Acer Aspire 4755G for my daughter. It's running Windows 7 Home Basic. Now I would like to upgrade it to Windows 8 but first I need to backup the computer. When I tried to perform a Windows Backup to an external USB disk it failed with the following message:

Logboeknaam:   Application
Bron:          Windows Backup
Datum:         29-12-2012 21:39:32
Gebeurtenis-id:4104
Taakcategorie: Geen
Niveau:        Fout
Trefwoorden:   Klassiek
Gebruiker:     n.v.t.
Computer:      MaloukeLaptop
Beschrijving:
De back-up is niet geslaagd. Fout: Een van de back-upbestanden kan niet worden gemaakt. (0x8078002A).
Gebeurtenis-XML:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
    <Provider Name="Windows Backup" />
    <EventID Qualifiers="0">4104</EventID>
    <Level>2</Level>
    <Task>0</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2012-12-29T20:39:32.000000000Z" />
    <EventRecordID>2336</EventRecordID>
    <Channel>Application</Channel>
    <Computer>MaloukeLaptop</Computer>
    <Security />
</System>
<EventData>
    <Data>Een van de back-upbestanden kan niet worden gemaakt. (0x8078002A)</Data>
    <Binary>2A007880E30500003F0900005B090000420ED1665C2BEE174B64529CB14610EA71000000</Binary>
</EventData>
</Event>

(Computer has the dutch language)

I looked on one support site of microsoft which says one should install Windows6.1-KB982018-v3-x64, but this update was already installed.

Next I turned to Acer Backup Manager. With that I've made a backup file and a Bootable DVD. When I boot with this DVD I have no access to my external Seagate USB hard drive.

I have copied the backup files to the local harddisk, but when I open the cal file of this backup I cannot select a destination where to restore my files.