2.) Security update for Microsoft .NET Framework 4 Client Profile (KB2518870) Installed 08/16/2011
Let's try the 2nd one.
http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=26409 Download x86.exe installer 18.0 MB after saving then install. Same result? If it went on another error installation, try Selective Start up.
1. Click Start, type
msconfig in the start search box and then press Enter.
2. If you are prompted for an Administrator password or for confirmation, type the password or click Continue.
3. Under Startup Selection, choose
Selective Startup and clear the
Load Startup Items check box.
4. Click the Services tab, click to select
Hide All Microsoft Services check box, and then click
Disable All.5. Click Ok.
6. When you are prompted, click
Restart.
7. Try the Windows Update again.
If same result, install them manually starting with the KB 2539636 security update you previously downloaded but cannot install.