I was having this problem and the error message said:
Installation of Microsoft Visual C++ 2008 Error 1935. An error occurred during the installation of assembly Microsoft.VC90.OpenMP, version=“9.0.30729.4148”, publicKeyToken =“1fc8b3b9a1e18e3b” processor Architecture = "x86,type=“win32”. Please refer to Help and Support for more information. HRESULT: 0x800736FD
So I searched on the version # and found that this particular assembly/component is a problem for other things as well. One of the sites I looked at said:
This problem occurs on some new Windows 7 computers because the registry has reached its size limit and must be increased.
Start menu > type “regedit” (without quotes) into the search box > Enter.
Go to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control in your Registry.
If you do not see an entry called RegistrySizeLimit along the right for the Control key, you will have to add it. Right-click on the white space > New > Key > DWORD (32-bit) Value.
To set the Value, right-click on RegistrySizeLimit > Modify. Setup this entry as follows:
Value: 4294967295 - as base Decimal
Reboot your computer.
Test the update/install again
I did this and my problem installing LibreOffice 3.5 was resolved (along with a few Windows Update issues I had been having).