Windows Update errors

My sisters computer keeps getting errors while trying to install a few updates and I don't know why. I have tried installing them a few times, and have tried doing them all at once and 1 at a time but every time they fail. It also says that 1 succeeded and 3 failed but there's always 4 updates that show up so the one that "suceeded" doesn't actually install.

The updates that show up in windows update are:
-Security Update for Microsoft Visual C++ 2005 Service Pack 1 Redistributable Package (KB2538242)
-Internet Explorer for Windows 7 for x64- based systems
-Update for Microsoft.NET Framework 4 on Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows Server 2008, Windows Server 2008 R2 for x64- based Systems (KB2468871)
-Update for Windows 7 for x64- based Systems (KB2904266)

Errors found when trying to install the updates : Code 80070490 , Code 66A & Code 9C59.

Obviously these updates aren't super important but I don't know why they won't install. Any help is much appreciated...thanks in advance.

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: Intel(R) Core(TM) i5-3230M CPU @ 2.60GHz, Intel64 Family 6 Model 58 Stepping 9
Processor Count: 4
RAM: 7888 Mb
Graphics Card: Intel(R) HD Graphics 4000, -1984 Mb
Hard Drives: C: Total - 461437 MB, Free - 338485 MB; Q: Total - 13999 MB, Free - 2824 MB;
Motherboard: LENOVO, 2359CTO
Antivirus: AVG AntiVirus Free Edition 2014, Updated and Enabled